Load UIImage from URL in iOS

Question

I am trying to load a UIImage from its URL with completionand placeholder image , but neither the UIImage nor the placeholder UIImage are loaded.

Here is my code:

  NSURL *url = [NSURL URLWithString:@"http://assets.gearlive.com/tvenvy/blogimages/stewiegriffin.jpg"];
  NSURLRequest *request = [NSURLRequest requestWithURL:url];

  [self.imageView setImageWithURLRequest:request placeholderImage:[UIImage imageNamed:@"bg.png"]

      success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
          imageView.image = image;
      } 
      failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {}
   ];

Solution 1

Use AFnetworking where you can set placeholder image also if the url is not correct. This is more efficient when you are loading images in a tableview or a collection view.

Import UIImageView+AFNetworking.h

#import "UIImageView+AFNetworking.h"

and us the following code:

NSString *url1=@"http://www.fnordware.com/superpng/pnggrad16rgb.png";
[self.image setImageWithURL:[NSURL URLWithString:url1] placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; 

You can download it from gitHub

Solution 2

Try this code to get image...

Code:

NSURL *url = [NSURL URLWithString:@"http://www.fnordware.com/superpng/pnggrad16rgb.png"];

NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];

[self.imageview1 setImage:image];    

Note: i have used test url. you can use your url.

Update : Swift 3.0 Code :

let url = URL(string: "http://www.fnordware.com/superpng/pnggrad16rgb.png")
    do {
        let  data = try Data(contentsOf: url!)
        var image = UIImage(data: data)
        self.imageView.image = image
        print(image)
    } catch {

    }

Note : In Xcode version 7.1 and above you need to set ATS (App Transport Security). To set ATS you need write below code in info.plist file. Make sure url of image should not be nil.

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

Solution 3

Check out AsyncImageView. Its the best async image loader AFAIK. all you have to do is set the image URL to the imageview and the rest is taken care of. including caching.

Solution 4

I found the problem

My code is working correctly.

The problem was somewhere in my code , the ImageView was nil. Thanks all

View more solutions

Comments

[thanhbinh84]

this one is very easy to use

[Simon]

Tested this in Playgrounds, converted to swift 3, and works perfectly! Thanks!

[Nikhil Manapure]

I had used SDImage, never knew AF could do that too...Thanks

[Jignesh B]

can i able to use image url as placeholder image ?

[Ashok Londhe]

@Simon Thanks for your feedback i have updated the answer and also added code for swift.

[C-H-E-F]

For any future devs, the import is no longer necessary.