How to add activity indicator to image load - ios

Question

I want to add activity indicator to image load on image view. How it possible please help, Thank You
My code
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;
NSLog(#"Error in receiving data %#",error);
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
NSLog(#"response data %#",json);
NSArray* results = [json objectForKey:#"status"];
NSArray *imageUrlArray = [results valueForKey:#"slider_image_path"];
NSLog(#"images %#",imageUrlArray);
NSMutableArray *arrayImages = [[NSMutableArray alloc] init];
for (NSString *strImageUrl in imageUrlArray) {
[arrayImages addObject:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:strImageUrl]]]];
}
self.imageview.animationImages = arrayImages;
_imageview.animationDuration = 10;
_imageview.animationRepeatCount = 0;
[_imageview startAnimating];
}

Answer 1

Do like following :
UIActivityIndicatorView *indctr = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[indctr startAnimating];
[indctr setCenter:self.imageView.center];
[self.contentView addSubview:indctr];

Answer 2

Use this Code
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[indicator startAnimating];
[indicator setCenter:self.imageView.center];
[self.contentView addSubview:indicator];
Remove the indicator from the superview in the block's succes method.
[_imageView setImageWithURL:[NSURL URLWithString:anURL]
success:^(UIImage *image) {
[indicator removeFromSuperview];
}
failure:^(NSError *error) {
}];
}

Answer 3

You Can use the MBProgress HUD class:https://github.com/jdg/MBProgressHUD
download it and in your code set this:
-(void)viewDidLoad{
MBProgressHUD *HUD = [[MBProgressHUD alloc]initWithView:self.view];
[self.view addSubview:HUD];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;
NSLog(#"Error in receiving data %#",error);
[HUD show: YES];
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
NSLog(#"response data %#",json);
NSArray* results = [json objectForKey:#"status"];
NSArray *imageUrlArray = [results valueForKey:#"slider_image_path"];
NSLog(#"images %#",imageUrlArray);
NSMutableArray *arrayImages = [[NSMutableArray alloc] init];
for (NSString *strImageUrl in imageUrlArray) {
[arrayImages addObject:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:strImageUrl]]]];
}
self.imageview.animationImages = arrayImages;
_imageview.animationDuration = 10;
_imageview.animationRepeatCount = 0;
[_imageview startAnimating];
[HUD hide: YES];
}