Unable to append an array of images to another array swift - arrays

Question

MY JSON:
{
"response" : {
"start" : 0,
"docs" : [
{
"enrollmentId" : [
"KAR\KDF6"
],
"fieldName2" : [
"Languages"
],
"locality" : [
"Boret"
],
"active" : [
true
],
"sex" : [
"Male"
],
"latitude" : [
12.457
],
"city" : [
"Booer"
],
"imageData" : [
"data:image\/png;base64,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"
],
"fieldValue2" : [
"English, Hindi, Kannada"
],
"fieldValue1" : [
"11 years"
],
"state" : [
"Kerr"
],
"id" : "sdffsdfsdf",
"email" : [
"me#some.com"
],
"longitude" : [
77.552492
],
"firstName" : [
"Prashya"
],
"_version_" : 145434759168,
"experience" : [
12
],
"caseTypes" : [
"some some"
],
"lastName" : [
"Bhaer"
],
"mode" : [
"Lawyer"
],
"fieldName1" : [
"Experience"
]
},
{
"state" : [
"Rater"
],
"languages" : [
"English",
"Hindi",
"Kannada"
],
"lastName" : [
"K"
],
"firstName" : [
"Rresr"
],
"sex" : [
"Male"
],
"caseTypes" : [
"So many"
],
"enrollmentId" : [
"KARdsfs"
],
"mobile" : [
98453445
],
"id" : "Rajfsdsg",
"imageData" : [
"data:image\/png;base64,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"
],
"active" : [
true
],
"mode" : [
"Lawyer"
],
"city" : [
"Bangalore"
],
"_version_" : 15214536,
"email" : [
"me#me.com"
],
"experience" : [
18
],
"locality" : [
"bajaj"
]
}
],
"numFound" : 2
},
"responseHeader" : {
"status" : 0,
"QTime" : 1,
"params" : {
"q" : "mode:(\"Lawyer\", \"CA\") AND active:true AND city:(\"Boret\") AND locality:(\"bajaj\") AND caseTypes:(\"fly fly\")",
"wt" : "json"
}
}
}
I've declared a global array private var items = [UIImage]() and private var cellsIsOpen = [Bool]() .
I'm converting the bas64 imageData strings obtained from JSON data and returning an array of UIImage like
public func loadimages(url: String!) -> [UIImage]{
let unsafe = url
var data1 = [UIImage]()
let bingo = NSURL(string: unsafe!)
Alamofire.request(.GET, bingo!)
.validate()
.responseJSON{ response in
switch response.result{
case .Success:
let json33 = JSON(data: response.data!)
let allImageStrings = json33["response"]["docs"].flatMap { $0.1["imageData"].first?.1}
for Bro in allImageStrings{
let url = NSURL(string: Bro.string!)
let data = NSData(contentsOfURL: url!)!
let image = UIImage(data: data)
data1.append(image!)
}
self.items = data1
//print(self.items.count)
case .Failure(let error):
print(error)
}
}
return data1
}
And in
override public func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
print(self.items.count)
return self.items.count
}
the count is showing 0. The Array items is not getting appended AT ALL. How do I append it? I'm even trying to do
override public func viewDidLoad() {
// Do any additional setup after loading the view.
itemSize = CGSize(width: 214, height: 264)
super.viewDidLoad()
let gt: [UIImage] = loadimages("someurl&wt=json")
items.append(gt) //Error: Cannot convert value of type '[UIImage]' to expected argument type 'UIImage'
print(items.count)
}
And there it this function
func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
guard let cell = cell as? CollectViewCell else { return }
// var index = indexPath.row % 4
//let info = items
for item in items{
cell.backgroundImageView.image = item
}
cell.cellIsOpen(cellsIsOpen[indexPath.row], animated: false) //Here
collectionView.reloadData()
}
*Here, it crashes saying Index out of range.
Help Please?

Answer 1

It looks like your problem might be with your Alamofire request. Either it fails and so nothing it appended since you append under your success case, or you're trying to print the items before anything is loaded because it is an asynchronous request. Try appending an image under your failure case.
Also the reason you are getting the error "Cannot convert value of type '[UIImage]' to expected argument type 'UIImage' " is because you are trying to append an entire array to an array, when you need to just append a single element, in this case, a UIImage.
try this to test the size of your array instead
let gt: UIImage = UIImage()
items.append(gt)
print(items.count)

Answer 2

Alamofire is nice that it grabs the main thread in the callback making UI easy to update. Your first call to collectionView's dataSource methods will be before the request is done. However. calling collectionView.reloadData() after setting self.items should solve your issue.
case .Success:
let json33 = JSON(data: response.data!)
let data = json33["response"].stringValue.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
let json = JSON(data: data!)
let allImageStrings = json["docs"].flatMap { $0["imageData"].first?.stringValue }
for Bro in allImageStrings{
let imgString = Bro.stringByReplacingOccurrencesOfString("data:image/png;base64," , withString: "")
let imgData = imgString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
let image = UIImage(data: imgData)
data1.append(image!)
}
self.items = data1
//Add
self.collectionView.reloadData()
All data source methods are recalled on the collectionView when reloadData() is called so if you have successfully created images (This may be an underlying problem as well), you should get a count the next time these dataSource methods are called.

Answer 3

Try this
Replace this array type
var data1 = [UIImage]()
with this type of array for type safety sometime array not getting correct format so failed to append value
Use this Array:-
var data1 = [AnyObject]()
I hope this will help you.