I have an animation, during which I want to disable the keyboard but not hide it. I even tried self.view.userInteractionEnabled = NO;, but that hides the keyboard. I guess it must call resignFirstResponder.
To disable everything, you can use
[[UIApplication sharedApplication] beginIgnoringInteractionEvents];
right before you start the animation and
[[UIApplication sharedApplication] endIgnoringInteractionEvents];
after the animation finishes, e.g., in its completion block.
You can disable the keyboard without dismissing it by doing:
NSArray *windows = [UIApplication sharedApplication].windows;
if ([windows count] > 1) {
UIWindow *keyboardWindow = windows[1];
keyboardWindow.userInteractionEnabled = NO;
}
But, it's obviously very hackish & fragile, and I'm not sure if it complies with Apple's terms.
Related
You can set the autocapitalizationType property of a UITextField so all input is in upper case. I find that does work fine on the simulator (when actually tapping the simulator's keypad, not the Mac's keyboard), but not on the device? Everything stays lowercase.
In the UICatalog demo I added to the textFieldNormal method:
textFieldNormal.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;
Added a delegate too, to display the actual autocapitalizationType for the UITextField:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog( #"textField.autocapitalizationType=%d", textField.autocapitalizationType );
}
It will properly display 3 (=UITextAutocapitalizationTypeAllCharacters), but anything you tap remains lowercase. What am I missing?
Apparently this is a device general settings issue: Settings -> General -> Keyboard -> Auto-Capitalization must be ON to honour the setting of textField.autocapitalizationType to all upper case, else setting the property is ignored, apparently. If I switch it on everything works as expected.
You could try something like this the the textfield delegate:
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (range.length == 0) { // not deleting , but adding a char
textField.text = [textField.text stringByAppendingString:[string uppercaseString]];
return NO;
}
return YES;
}
This works only if you try to insert a symbol at the end of the text.
Should you want to play with the text in the middle you could play with
range.location
and also you will need to play with the cursor positioning as it will go at the end every time...
I hope this helps someone.
I want to add a button that show/hides the popover, similarly to the one of the DropBox app.
(In both landscape & portrait)
I have tried many solutions, but at this stage I don't even want to muddy the water with my attempts. If you've done this, or know how to do this, please send me in the right direction!
Thanks!
it appears it's quite simple.
Set some object to be delegate of splitViewController. In my case (I create all viewcontrollers programatically) that was appdelegate.
UISplitViewController* splitViewController = [[UISplitViewController alloc] init];
[splitViewController setViewControllers:#[navigationViewController1, navigationViewController2]];
splitViewController.delegate = self;
Implement delegate method to hide master in portrait orientation:
- (BOOL)splitViewController:(UISplitViewController *)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation {
return UIInterfaceOrientationIsPortrait(orientation);
}
Actually add barButtonItem:
-(void)splitViewController:(UISplitViewController *)svc
willHideViewController:(UIViewController *)aViewController
withBarButtonItem:(UIBarButtonItem *)barButtonItem
forPopoverController:(UIPopoverController *)pc {
UINavigationController* slaveNavigationViewController = svc.viewControllers[1];
UIViewController* slaveViewController = slaveNavigationViewController.viewControllers[0];
[barButtonItem setTitle:#"Your master title"];
slaveViewController.navigationItem.leftBarButtonItem = barButtonItem;
}
In this method, you get barButtonItem which you customize and add to slaveViewController.
And last one, remove the button in landscape orientation:
- (void)splitViewController:(UISplitViewController *)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {
UINavigationController* slaveNavigationViewController = svc.viewControllers[1];
UIViewController* slaveViewController = slaveNavigationViewController.viewControllers[0];
[barButtonItem setTitle:#"Drops"];
slaveViewController.navigationItem.leftBarButtonItem = nil;
}
That's it.
There's a simpler, undocumented way to do it. For an existing UIButton:
[button addTarget: theSplitViewController action: #selector(toggleMasterVisible:) forControlEvents:UIControlEventTouchUpInside];
This target/action are the same as for the barButtonItem sent in the willHideViewController function.
I use an instance of UITextField in which the text is normally aligned to the right, but switches to left alignment when being edited. This is done by calling setTextAlignment: on the editingDidBegin event. Since the update to iOS 6 this behaves strangely: The text alignment is changed correctly from right to left, but the cursor remains at the far right of the text field until some input is performed.
Does anybody know how to restore the expected behaviour so that the cursor moves as well when the alignment is changed?
To give some context: I use the text field to show a value with a unit. The unit is removed during editing and then displayed again after the user hits enter.
Method called on event editingDidBegin:
- (IBAction)textEditingDidBegin:(UITextField *)sender
{
[sender setTextAlignment:NSTextAlignmentLeft];
[sender setText:[NSString stringWithFormat:#"%.0f", width]];
}
Method called on event editingDidEnd:
- (IBAction)textEditingDidEnd:(id)sender
{
[sender setTextAlignment:UITextAlignmentRight];
[sender setText:[NSString stringWithFormat:#"%.0f m", width]];
}
Try resigning the textView as first responder, then make it first responder right after that.
textView.textAlignment = NSTextAlignmentCenter;
[textView resignFirstResponder];
[textView becomeFirstResponder];
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
textField.textAlignment = NSTextAlignmentLeft ;
return YES ;
}
Change the textAlignment before editing did begin. The best place I know to do this is in the UITextFieldDelegate method textFieldShouldBeginEditing.
I want to implement pull-down-to-refresh in a UICollectionViewController under iOS 6. This was easy to achieve with a UITableViewController, like so:
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(startRefresh:)
forControlEvents:UIControlEventValueChanged];
self.refreshControl = refreshControl;
The above implements a nice liquid-drop animation as part of a native widget.
As UICollectionViewController is a "more evolved" UITableViewController one would expect somewhat of a parity of features, but I can't find a reference anywhere to a built-in way to implement this.
Is there a simple way to do this that I'm overlooking?
Can UIRefreshControl be used somehow with UICollectionViewController despite the header and docs both stating that it's meant to be used with a table view?
The answers to both (1) and (2) are yes.
Simply add a UIRefreshControl instance as a subview of .collectionView and it just works.
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(startRefresh:)
forControlEvents:UIControlEventValueChanged];
[self.collectionView addSubview:refreshControl];
That's it! I wish this had been mentioned in the documentation somewhere, even though sometimes a simple experiment does the trick.
EDIT: this solution won't work if the collection is not big enough to have an active scrollbar. If you add this statement,
self.collectionView.alwaysBounceVertical = YES;
then everything works perfectly. This fix taken from another post on the same topic (referenced in a comment in the other posted answer).
I was looking for the same solution, but in Swift. Based on the above answer, I have done the following:
let refreshCtrl = UIRefreshControl()
...
refreshCtrl.addTarget(self, action: "startRefresh", forControlEvents: .ValueChanged)
collectionView?.addSubview(refreshCtrl)
Not forgetting to:
refreshCtrl.endRefreshing()
I was using Storyboard and setting self.collectionView.alwaysBounceVertical = YES; did not work. Selecting the Bounces and Bounces Vertically does the job for me.
The refreshControl property has now been added to UIScrollView as of iOS 10 so you can set the refresh control directly on collection views.
https://developer.apple.com/reference/uikit/uiscrollview/2127691-refreshcontrol
UIRefreshControl *refreshControl = [UIRefreshControl new];
[refreshControl addTarget:self action:#selector(refreshControlAction:) forControlEvents:UIControlEventValueChanged];
self.collectionView.refreshControl = refreshControl;
mjh's answer is correct.
I ran into the issue where if the the collectionView.contentSize was not larger then the collectionView.frame.size, you can not get the collectionView to scroll. You can not set the contentSize property either (at least I couldn't).
If it can't scroll, it won't let you do the pull to refresh.
My solution was to subclass UICollectionViewFlowLayout and overide the method:
- (CGSize)collectionViewContentSize
{
CGFloat height = [super collectionViewContentSize].height;
// Always returns a contentSize larger then frame so it can scroll and UIRefreshControl will work
if (height < self.collectionView.bounds.size.height) {
height = self.collectionView.bounds.size.height + 1;
}
return CGSizeMake([super collectionViewContentSize].width, height);
}
I want to display a MPMoviePlayerViewController in full screen mode, but when the fullscreen button of the movieplayercontroller view is beeing pressed, first the MPMoviePlayerWillEnterFullscreenNotification gets called, as expacted, but than the MPMoviePlayerPlaybackDidFinishNotification is also beeing sent. As a reason it says MPMovieFinishReasonPlaybackEnded and i don't know, what i'm doing wrong. (In addition, i use iOS 6.0 and XCode 4.5.1)
My expactations are, that only the MPMoviePlayerWillEnterFullscreenNotification is beeing called.
Short explanation to the code below:
The MovieplayerViewController's view is beeing displayed in a tiny subview in my content view. When tapping the fullscreen-button, it first gets displayed as fullscreen but than also calls the exit button and stops playing (no crashes, nothing else).
MPMoviePlayerViewController *playerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:url];
[playerViewController.moviePlayer setControlStyle:MPMovieControlStyleEmbedded];
[playerViewController.moviePlayer setScalingMode:MPMovieScalingModeFill];
CGRect rect = videoView.frame;
rect.origin = CGPointZero;
[playerViewController.view setFrame:rect];
[playerViewController.moviePlayer prepareToPlay];
//movie this is my contents subview, where i add the viewcontroller's view as a subbview
[self.videoView addSubview:playerViewController.view];
[self.videoView setHidden:NO];
playerViewController.moviePlayer.useApplicationAudioSession = NO;
[playerViewController.moviePlayer play];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayerDidFinishNotification:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:playerViewController.moviePlayer];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayerWillEnterFullscreenNotification:)
name:MPMoviePlayerWillEnterFullscreenNotification
object:playerViewController.moviePlayer];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayerWillExitFullscreenNotification:)
name:MPMoviePlayerWillExitFullscreenNotification
object:playerViewController.moviePlayer];
//i store the movieplayer in a property, so i can use it for further operations
self.myPlayer = playerViewController;
[playerViewController release];
And thats it!
When the resize (or fullscreen) button is being pressed, the moviePlayerDidFinishNotification: method also is being called
- (void)moviePlayerDidFinishNotification:(NSNotification*) aNotification {
int reason = [[[aNotification userInfo] valueForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey] intValue];
if (reason == MPMovieFinishReasonPlaybackEnded) {
//movie finished playin
//in debug mode, it stops right at the NSLog
NSLog(#"");
}
else if (reason == MPMovieFinishReasonUserExited) {
//user hit the done button
}
else if (reason == MPMovieFinishReasonPlaybackError) {
//error
}
.. }
Is there something i do wrong or is there probably a change since iOS 6.0?
Ok, seems to be that there are some problems in the MPMoviePlayerViewController. What helped is to simply us the MPMoviePlayerController only.
For future reference the reason that your player showed in a small window was because you were setting:
[playerViewController.moviePlayer setControlStyle:MPMovieControlStyleEmbedded];
[playerViewController.moviePlayer setScalingMode:MPMovieScalingModeFill];
CGRect rect = videoView.frame;
rect.origin = CGPointZero;
[playerViewController.view setFrame:rect];
[playerViewController.moviePlayer prepareToPlay];
//movie this is my contents subview, where i add the viewcontroller's view as a subbview
[self.videoView addSubview:playerViewController.view];
[self.videoView setHidden:NO];
When you use an MPMoviePlayerViewController it creates it's own view controller. These calls are not necessary and will only create bizarre behavior. That's why the MPMoviePlayerController worked properly because it's designed to work inside another view controller.