How to get an image from URL and put into NSArray? - ios

Question

I would like to get an image from an URL and put it into a NSArray, but doesn't work in the below codes, please help:
#interface DataViewController ()
#property (readonly, strong, nonatomic) NSArray *picData;
#end
#implementation DataViewController
- (void)viewDidLoad {
NSString *imageUrlStringAA=#"http://aaa.net/AA.png";
NSString *imageUrlStringBB=#"http://aaa.net/BB.png";
NSURL *urlAA=[NSURL URLWithString:imageUrlStringAA];
NSURL *urlBB=[NSURL URLWithString:imageUrlStringBB];
NSData *dataAA=[[NSData alloc] initWithContentsOfURL:urlAA];
NSData *dataBB=[[NSData alloc] initWithContentsOfURL:urlBB];
UIImage *imageAA=[UIImage imageWithData:dataAA];
UIImage *imageBB=[UIImage imageWithData:dataBB];
_picData = [NSArray arrayWithObjects:imageAA, imageBB, nil];
Any ideas is appreciated, thank you.

Answer 1

First thing for download anything from http protocol then Add following diction in info.plist
And now try this code:
#interface DataViewController ()
#property (readonly, strong, nonatomic) NSArray *picData;
#end
#implementation DataViewController
- (void)viewDidLoad {
NSString *imageUrlStringAA=#"http://www.hdwallpapers.in/download/antelope_canyon-360x640.jpg";
NSString *imageUrlStringBB=#"http://www.hdwallpapers.in/download/vegeta_dragon_ball_super-360x640.jpg";
NSURL *urlAA=[NSURL URLWithString:imageUrlStringAA];
NSURL *urlBB=[NSURL URLWithString:imageUrlStringBB];
NSData *dataAA=[[NSData alloc] initWithContentsOfURL:urlAA];
NSData *dataBB=[[NSData alloc] initWithContentsOfURL:urlBB];
UIImage *imageAA=[UIImage imageWithData:dataAA];
UIImage *imageBB=[UIImage imageWithData:dataBB];
_picData = [NSArray arrayWithObjects:imageAA, imageBB, nil];
}

Answer 2

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^{
UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:
[NSURL URLWithString:#"Image URL"]]];
dispatch_sync(dispatch_get_main_queue(), ^{
if(image!= nil){
[[cell myimage] setImage:image];
}else{
UIImage * image = [UIImage imageNamed:#"PLACEHOLDER"];
[[cell myimage] setImage:image];
}
[cell setNeedsLayout];
});
});
Try these...