Throwing a MacOS notification from a minimal standalone Objective-C program? - c

I'm trying to implement push notifications on MacOS within a C codebase. Ideally, there'd just be one Objective-C file containing (1) a public C function I can call and (2) some Objective-C code I can use to throw a notification. This way, the source files can be compiled and linked seamlessly in the build process.
Toward this end, I've been trying to create a minimal example that can throw notifications with just a single .m file (not an entire XCode project), much like the one discussed in NSUserNotificationCenter not showing notifications. However, two problems:
I still can't get the code to work despite trying the solutions in the aforementioned link. It compiles and runs but does not throw a notification.
If possible, we'd like to switch to the new user notifications API. Not a big deal if this isn't possible for now, though.
Here's what I've tried so far:
#import <Foundation/Foundation.h>
#import <Foundation/NSUserNotification.h>
#interface AppDelegate : NSObject <NSUserNotificationCenterDelegate>
#end
#implementation AppDelegate
- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center
shouldPresentNotification:(NSUserNotification *)notification {
return YES;
}
- (void)throwNotification {
NSUserNotification *userNotification = [[NSUserNotification alloc] init];
userNotification.title = #"Some title";
userNotification.informativeText = #"Some text";
printf("trying to throw {%s %s}\n", [[userNotification title] UTF8String], [[userNotification informativeText] UTF8String]);
[[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:userNotification];
}
#end
int main (int argc, const char * argv[]) {
AppDelegate *app = [[AppDelegate alloc] init];
[app throwNotification];
return 0;
}
This is compiled with cc -framework Foundation -o app main.m.
Any insight would be appreciated!

The problem is that in order to display a notification, you need to have a proper bundle identifier.
We're going to take a bit of the code from here, where we wait for the notification to get displayed. We can embed an Info.plist file into the compiled binary, which will accomplish the same thing as the swizzling code in a file called notify.m:
#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#interface AppDelegate : NSObject<NSUserNotificationCenterDelegate>
#property (nonatomic, assign) BOOL keepRunning;
#end
int main (int argc, const char * argv[])
{
#autoreleasepool {
NSApplication *app = [NSApplication sharedApplication];
AppDelegate *appdel = [[AppDelegate alloc] init];
app.delegate = appdel;
NSUserNotificationCenter *nc = [NSUserNotificationCenter defaultUserNotificationCenter];
nc.delegate = appdel;
appdel.keepRunning = TRUE;
NSUserNotification *userNotification = [[NSUserNotification alloc] init];
userNotification.title = #"Some title";
userNotification.informativeText = #"Some text";
[[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:userNotification];
while (appdel.keepRunning) {
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.1]];
}
}
return 0;
}
#implementation AppDelegate
- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center
shouldPresentNotification:(NSUserNotification *)notification {
return YES;
}
- (void)userNotificationCenter:(NSUserNotificationCenter *)center didDeliverNotification:(NSUserNotification *)notification
{
self.keepRunning = NO;
}
#end
I construct an Info.plist file consisting of the following:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleIdentifier</key>
<string>com.apple.finder</string>
</dict>
</plist>
Please use an appropriate bundle identifier, as com.apple.finder will cause all these notifications to appear to come from macOS Finder, which might be confusing to users.
I then compile it using:
clang -o notify -framework Cocoa notify.m -Wl,-sectcreate,_\_TEXT,__info_plist,Info.plist
there's a \ in that build line to avoid the markdown parsing of the underscores, but it's not needed for the actual build command line.

Related

Download file using AFNetworking on iOS 6

I've recently updated to AFNetworking 2.0. The documentation said it is compatible with iOS6.0+. I am building a iOS 6.0 app, when I am trying to implement a download method (both images and videos). The example use
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
However, I got an "Use of undeclared identifier 'AFURLSessionManager'" error. And I found out that AFURLSessionManager use a class that is only available from iOS7. I'm just wondering, who could I download in iOS6 using AFNetworking?
Also, is there anyway to see download progress?
Thank you
You can use the AFHTTPRequestOperation class to perform a file download on iOS 6. You basically just need to set the operation's outputStream property to store the file and the downloadProgressBlock property to monitor the progress.
The bare bones method below is declared in a class that is a subclass of AFHTTPRequestOperationManager. When I initialized an instance of this class I set up the baseURL property.
- (AFHTTPRequestOperation *)downloadFileWithContentId:(NSString *)contentId destination:(NSString*)destinationPath {
NSString *relativeURLString = [NSString stringWithFormat:#"api/library/zipped/%#.zip", contentId];
NSString *absoluteURLString = [[NSURL URLWithString:relativeURLString relativeToURL:self.baseURL] absoluteString];
NSMutableURLRequest *request = [self.requestSerializer requestWithMethod:#"GET" URLString:absoluteURLString parameters:nil];
void (^successBlock)(AFHTTPRequestOperation *operation, id responseObject) = ^void(AFHTTPRequestOperation *operation, id responseObject) {
};
void (^failureBlock)(AFHTTPRequestOperation *operation, NSError *error) = ^void(AFHTTPRequestOperation *operation, NSError *error) {
};
AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:successBlock failure:failureBlock];
NSOutputStream *outputStream = [NSOutputStream outputStreamToFileAtPath:destinationPath append:NO];
operation.outputStream = outputStream;
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
}];
[self.operationQueue addOperation:operation];
return operation;
}
try this...
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
AFHTTPRequestOperation *operation = [manager GET:urlString
parameters:nil
success:^(AFHTTPRequestOperation *operation, NSData *responseData)
{
[responseData writeToURL:someLocalURL atomically:YES];
}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"Downloading error: %#", error);
}];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead)
{
float downloadPercentage = (float)totalBytesRead/(float)(totalBytesExpectedToRead);
[someProgressView setProgress:downloadPercentage animated:YES];
}];
As you say AFURLSessionManager is only available in iOS 7(is backed by NSURLSession), so you should use the NSURLConnection based classes in AFNetworking 2.0 (AFHTTPRequestOperationManager, AFHTTPRequestOperation, etc).

Accessing a variable in multiple methods

Still a bit new and I am having some issues I was hoping someone could help with. I am trying to load a JSON string coming from my server into a collectionview in iOS6
I can pull in the data using a fetchedData method called from the viewDidLoad method and that part works fine. In the fetchedData method, I break out the JSON data and place it in NSDictionaries and NSArrays and can dump the correct data to the log to see it.
The problem is when I try and use any of the information elsewhere in my code such as get the amount of elements in any of hte arrays to use as a counter to fill the collectionview.
It may be that I am tired but I can't seem to get my head around this part. The declaration of many of the main variables was in the fetchedData method and I thought since the were declared there it could be the reason I could not see them elsewhere so I moved the declaration of the variables to the interface section and was hoping this would make the variables GLOBAL and the fetchedData method continues to work just fine, but nowhere else.
When I put in breaks in the cell definition area I can see in the debugger window the variables come up as empty.
I am not sure what sections of the code you may want to see so let me know and I can post them but maybe someone could give an example of how arrays and dictionary items can be accessed in multiple methods.
To avoid confusion and to expose my hodgepodge of code at this point anyway here is the .m file or at least most of it Please don't rip to hard on the coding style I have been trying anything I could think of and tore it up pretty hard myself and it was late.
#import "ICBCollectionViewController.h"
#import "ICBCollectionViewCell.h"
#import "ICBDetailViewController.h"
#interface ICBCollectionViewController () {
NSDictionary* json;
NSDictionary* title;
NSDictionary* shortDescrip;
NSDictionary* longDescrip;
NSDictionary* price;
NSDictionary* path;
NSDictionary* sKU;
NSDictionary* audiotrack;
NSDictionary* audiotracksize;
NSArray* titles;
NSArray* shortDescription;
NSArray* longDescription;
NSArray* prices;
// NSArray* paths;
NSArray* SKUs;
NSArray* audiotracks;
NSArray* audiotracksizes;
}
#end
/*
#interface NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress;
-(NSData*)toJSON;
#end
#implementation NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress
{
NSData* data = [NSData dataWithContentsOfURL: [NSURL URLWithString: urlAddress] ];
__autoreleasing NSError* error = nil;
id result = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error != nil) return nil;
return result;
}
-(NSData*)toJSON
{
NSError* error = nil;
id result = [NSJSONSerialization dataWithJSONObject:self options:kNilOptions error:&error];
if (error != nil) return nil;
return result;
}
#end
*/
#implementation ICBCollectionViewController
#synthesize paths;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL: imobURL];
[self performSelectorOnMainThread:#selector(fetchedData:) withObject:data waitUntilDone:YES];
});
// Do any additional setup after loading the view.
}
- (void)fetchedData:(NSData *)responseData {
NSError* error;
//parse out the json data
json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
titles = [json objectForKey:#"title"]; //2
shortDescription = [json objectForKey:#"shortD"];
longDescription = [json objectForKey:#"longD"];
prices = [json objectForKey:#"price"];
self.paths = [json objectForKey:#"path"];
SKUs = [json objectForKey:#"SKU"];
audiotracks = [json objectForKey:#"audiotrack"];
audiotracksizes = [json objectForKey:#"audiotracksize"];
NSLog(#"paths: %#", paths); //3
// NSLog(#"shortDescrip: %#", shortDescription);
NSInteger t=7;
// 1) Get the latest loan
title = [titles objectAtIndex:t];
shortDescrip = [shortDescription objectAtIndex:t];
longDescrip = [longDescription objectAtIndex:t];
price = [prices objectAtIndex:t];
path = [paths objectAtIndex:t];
sKU = [SKUs objectAtIndex:t];
audiotrack = [audiotracks objectAtIndex:t];
audiotracksize = [audiotracksizes objectAtIndex:t];
//NSLog(title.count text);
//NSLog(title.allValues);
// 2) Get the data
NSString* Title = [title objectForKey:#"title"];
NSString* ShortDescrip = [shortDescrip objectForKey:#"shortD"];
NSString* LongDescrip = [longDescrip objectForKey:#"longD"];
NSNumber* Price = [price objectForKey:#"price"];
NSString* Path = [path objectForKey:#"path"];
NSString* SKU = [sKU objectForKey:#"SKU"];
NSString* AudioTrack = [audiotrack objectForKey:#"audiotrack"];
NSNumber* AudioTrackSize = [audiotracksize objectForKey:#"audiotracksize"];
/*************************HERE THE DATA EXISTS*******************************/
/******** Path = "XYXYXYXYXYXY" for example ********************************/
// 3) Set the label appropriately
NSLog([NSString stringWithFormat:#"Here is some data: Title: %# Path %# SKU: %# Price: %# Track %# Size %#",Title, Path, SKU, Price, LongDescrip, AudioTrackSize]);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
//DetailSegue
if ([segue.identifier isEqualToString:#"DetailSegue"]) {
ICBCollectionViewCell *cell = (ICBCollectionViewCell *)sender;
NSIndexPath *indexPath = [self.collectionView indexPathForCell:cell];
ICBDetailViewController *dvc = (ICBDetailViewController *)[segue destinationViewController];
dvc.img = [UIImage imageNamed:#"MusicPlayerGraphic.png"];
}
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
NSLog(#"paths qty = %d",[paths count]);
return 20;
}
// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier=#"Cell";
ICBCollectionViewCell *cell = (ICBCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
// paths = [json objectForKey:#"path"];
NSDictionary* path = [paths objectAtIndex:indexPath.row];
NSString* Path = [path objectForKey:#"path"];
// NSString* Path = [paths objectAtIndex:indexPath.row];
NSLog(#"%d",indexPath.row);
/***********************HERE IT DOES NOT**************************/
/******** Path = "" **********************************************/
NSLog(#"xxx");
NSLog(path);
NSLog(paths);
NSLog(Path);
NSLog(#"ZZZ");
Path=#"deepsleep";
NSLog(#"xxx");
NSLog(Path);
NSLog(#"ZZZ");
// paths = [json objectForKey:#"path"];
// NSString* Path = [path objectForKey:#"path"];
NSString *imagefile = [NSString stringWithFormat:#"https://imobilize.s3.amazonaws.com/glennharrold/data/%#/mid.png", Path];
NSLog(imagefile);
NSURL *url1=[NSURL URLWithString:imagefile];
dispatch_async(kBgQueue, ^{
NSData *data1 = [NSData dataWithContentsOfURL:url1];
cell.imageView.image =[[UIImage alloc]initWithData:data1];
});
return cell;
}
#end
Try breaking out the JSON data and sorting it in the appDelegate. If you declare public variables there #property (nonatomic, strong) NSDictionary *myDict etc., then you can access those variables by importing your appDelegate and using the following code:
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSDictionary *newDict = appDelegate.myDict;
Otherwise, you can store the information in a singleton, or in the root view controller. The key is to store your variables in a class that won't be deallocated. Most often, it is a bad idea to use a viewController for that purpose-- they have a tendency to be navigated away from, which deallocates the memory and gets rid of your variables. Google "model-view-controller" for more info.
I found out what the main issue was it the ViewDidLoad method I was using a background activity to get the JSON data from my server and as that process was running the foreground was also being processed and since the rest of the code was based on a value returned when the background process finished the data was actually null so all data based on that single piece were also null and it looked as if it was not available. Once I made the process run in the foreground all the variable started having values.
Thanks for your assistance with this

IOS 6 MPMoviePlayerController Rotation Issue

I have just updated to IOS 6 and now when I run my app the MPMoviePlayerControler shows the video incorrectly. The app is landscape but when the video is displayed in portrait. I have created new .h and .m files which is a child of MPMoviePlayerController. Here are my two files
.h
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#import <MediaPlayer/MediaPlayer.h>
#interface TrashPackPlayer : MPMoviePlayerController
#end
.m
#import "TrashPackPlayer.h"
#implementation TrashPackPlayer
-(id)init{
[super init];
return self;
}
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return UIInterfaceOrientationIsLandscape(toInterfaceOrientation);
}
#end
I create the media player like this:
player = [[TrashPackPlayer alloc] initWithContentURL:videoURL];
player.view.frame = CGRectMake(0, 0, sharedInfo.screenSize.width, sharedInfo.screenSize.height);
player.controlStyle = MPMovieControlStyleFullscreen;
player.scalingMode = MPMovieScalingModeAspectFit;
[player play];
[[[CCDirector sharedDirector] openGLView] addSubview:player.view];
Is this correct?
What do I need to do to get this displaying correctly?
Rotations in iOS6 have changed dramatically, check the fourth point at:
http://megawertz.com/blog/2012/9/20/ios-6-and-rotation
The top-most view controller is in charge of setting the allowed orientations, subclassing a view controller is not going to solve your problem.

UICollectionView Setup Help for Newbie

First, apologies if the answer is quite obvious but I'm brand new to iOS development (like this is the first app I'm trying to program even though it's just for me to play with :P) so the probability that my problem is rather minor is quite high.
Code (zip file containing the xcode project):
http://www.mediafire.com/?p55xw0q2dwwwwvm
I promise there's nothing else in there that's harmful :).
Problem:
I'm following:
http://www.techotopia.com/index.php/An_iPhone_iOS_6_Storyboard-based_Collection_View_Tutorial
I'm attempting to make a UICollectionView to play around with. I got down to the "Testing the Application" section. I put my own spin on a few parts from the guide:
instead of using different pictures, I just use 1 picture with a label at the bottom that just has a number in it. The number is dynamically set. Yes, I could implement it without the array I'm using, but having that array there will be helpful if I extend this project's scope in the future.
I added code in viewDidLoad to set the view layout to a flow layout. This was done again for futureproofing since once I get this working at a basic form I want to play around with formatting which will require me to subclass flowlayout.
The code compiles without errors but nothing shows up on the screen. I've checked the code to the best of my ability for about an hour or two, but nothing I did made any difference. My controller class is a bare bones attempt to just get the collection view to show up on screen, and my cell class is a bare bones cell with just an imageview and label in it.
Thanks for any help that can be given to get this working!
tl;dr
Just look at the bolded stuff. Code provided below for convenience:
MyCollectionViewController.m
#import "MyCollectionViewController.h"
#interface MyCollectionViewController ()
#property (nonatomic, strong) NSMutableArray *dataArray;
#end
#implementation MyCollectionViewController
#synthesize dataArray = _dataArray;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Create data to display
for(int i = 0; i < 50; i++){
[self.dataArray addObject:[NSString stringWithFormat:#"%d", i]];
}
// Configure Layout
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
[self.collectionView setCollectionViewLayout:flowLayout];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark -
#pragma mark UICollectionViewDataSource
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
-(NSInteger)collectionView:(UICollectionView*)collectionView numberOfItemsInSection:(NSInteger)section
{
return [self.dataArray count];
}
-(UICollectionViewCell*)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCollectionViewCell *myCell = [collectionView dequeueReusableCellWithReuseIdentifier:#"MyCell" forIndexPath:indexPath];
int row = [indexPath row];
UIImage* image = [UIImage imageNamed:#"200px-AND_ANSI"];
myCell.cellTitle = [self.dataArray objectAtIndex:row];
myCell.cellImageView.image = image;
myCell.backgroundColor = UIColor.whiteColor;
return myCell;
}
MyCollectionViewcontroller.h
#import <UIKit/UIKit.h>
#import "MyCollectionViewCell.h"
#interface MyCollectionViewController : UICollectionViewController <UICollectionViewDataSource, UICollectionViewDelegate>
#end
MyCollectionViewCell.h
#import <UIKit/UIKit.h>
#interface MyCollectionViewCell : UICollectionViewCell
#property (strong, nonatomic) IBOutlet UIImageView *cellImageView;
#property (strong, nonatomic) IBOutlet UILabel *cellTitle;
#end
MyCollectionViewCell.m
#import "MyCollectionViewCell.h"
#implementation MyCollectionViewCell
#synthesize cellImageView = _cellimageView;
#synthesize cellTitle = _cellTitle;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
#end
self.dataArray is nowhere allocated/initialized in your code and therefore is equal to nil. Sending messages to nil is allowed, but has no effect, therefore even after
for(int i = 0; i < 50; i++){
[self.dataArray addObject:[NSString stringWithFormat:#"%d", i]];
}
self.dataArray is still nil, and [self.dataArray count] returns 0.
You have to allocate and initialize the array with
self.dataArray = [[NSMutableArray alloc] init];
A proper place is some initXXX method of the view controller. But initWithNibName: is not called if the view controller is instantiated from a storyboard file, you have to use initWithCoder: instead:
- (id)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self) {
self.dataArray = [NSMutableArray array];
}
return self;
}

ivar is releasing under ARC - how do I retain it for use in another method?

I have been struggling with something for weeks and it has brought a real halt to my progress. I have asked a question a few times on SO, people have been helpful but no-one has cracked what I am doing wrong. It seems a fairly simple thing so hopefully someone out there will have a lightbulb moment and solve this. I am implementing a TWRequest, the result is coming back in a dictionary, I am looping through the results to extract a part of the tweet and creating an array of these 'text' components. Straight adter the loop through I am peinting the log of the array - _twitterText and it prints fine. Staright after this method is complete it seems as though _twitterText is being dumped. I have created it in my .h file as a strong property and created an ivar in viewdidload. Still no joy. how do I retain this array to use in another Method?
Here is my .h file....
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import "CustomCell.h"
#import "AppDelegate.h"
#import <Twitter/Twitter.h>
#interface MyViewController : UITableViewController <CLLocationManagerDelegate>
{
CLLocationManager *here;
}
#property(strong) NSDictionary *dict;
#property(strong) CLLocationManager *here;
#property (strong, nonatomic) NSMutableArray *twitterText;
- (void)fetchTweets;
#end </p>
Here is my .m implementation file......
#import "MyViewController.h"
#interface MyViewController ()
#end
#implementation MyViewController
#synthesize dict;
#synthesize twitterText = _twitterText;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
_twitterText = [[NSMutableArray alloc] init];
here = [[CLLocationManager alloc] init];
here.delegate = self;
[here startUpdatingLocation];
AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication]delegate];
NSLog(#"phrase carried over is %#", delegate.a);
[self fetchTweets];
}
- (void)fetchTweets
{
TWRequest *request = [[TWRequest alloc] initWithURL:[NSURL URLWithString:
#"http://search.twitter.com/search.json?q=%40wimbledon"]
parameters:nil requestMethod:TWRequestMethodGET];
[request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
{
if ([urlResponse statusCode] == 200)
{
// The response from Twitter is in JSON format
// Move the response into a dictionary and print
NSError *error;
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
//NSLog(#"Twitter response: %#", dict);
NSArray *results = [dict objectForKey:#"results"];
//Loop through the results
for (NSDictionary *tweet in results) {
// Get the tweet
NSString *twittext = [tweet objectForKey:#"text"];
// Save the tweet to the twitterText array
[_twitterText addObject:twittext];
}
NSLog(#"MY ************************TWITTERTEXT************** %#", _twitterText);
}
else
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"MyCell";
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
//cell.venueDetails.text = [_twitterText objectAtIndex:indexPath.row];
NSLog(#"MY ************************OTHER BIT THAT WONT PRINT************** %#", _twitterText);
return cell;
}
So the issue here is that your completion handler that you pass to -[TWTweet performRequestWithHandler:] isn't going to (can't) fire until the network connection is complete and the server responds to your request. That could take hundreds of milliseconds or even seconds to complete. (Or it may never happen).
Meanwhile while that is happening, the UITableView wants to draw itself and so will ask you how many sections/rows you have and then will ask you for a cell for each row. So when the table view asks, you should return the actual number of rows you have to draw at that time:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.twitterText count]; // the actual number of rows we have right now
}
So then the next step you need is to reload the table when your data is actually in from the server. That will prompt your table view to ask again for the number of sections and rows, and then ask for cells for each section and row. So somewhere in your completion block after you've processed all your data you will need to do this:
dispatch_async(dispatch_get_main_queue(), ^{
// you'll need an outlet to the UITableView
// here I assume you call that 'tableView'
// then just ask it to reload on the main thread
[self.tableView reloadData];
});
I hope that helps?

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