How to create UIImageView with image from a link?
22,396
Solution 1
NSURL *url = [NSURL URLWithString:@"http://img.abc.com/noPhoto4530.gif"];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
Solution 2
If you want to download the picture in the background, and then set it on the main thread, you can do it like this:
- (void)downloadPicture {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *url = [NSURL URLWithString:@"http://img.abc.com/noPhoto4530.gif"];
UIImage *image = [self getPicture:url];
dispatch_async(dispatch_get_main_queue(), ^{
[self setPicture:image];
});
});
}
- (UIImage *)getPicture:(NSURL *)pictureURL {
NSData *data = [NSData dataWithContentsOfURL:pictureURL];
UIImage *image = [UIImage imageWithData:data];
return image;
}
- (void)setPicture:(UIImage *)image {
UIImageView * imageView = [[UIImageView alloc] initWithFrame:
CGRectMake(kPictureX, kPictureY, image.size.height, image.size.width)];
[imageView setImage:image];
[self.view addSubview: imageView];
}
Solution 3
Here's a code snippet for those looking to use iOS 7's new suite of NSURLSession classes:
// Set NSURLSessionConfig to be a default session
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
// Create session using config
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
// Create URL
NSURL *url = [NSURL URLWithString:@"https://www.google.com/images/srpr/logo11w.png"];
// Create URL request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"GET";
// Create data task
NSURLSessionDataTask *getDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// Okay, now we have the image data (on a background thread)
UIImage *image = [UIImage imageWithData:data];
// We want to update our UI so we switch to the main thread
dispatch_async(dispatch_get_main_queue(), ^{
// Create image view using fetched image (or update an existing one)
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
// Do whatever other UI updates are needed here on the main thread...
});
}];
// Execute request
[getDataTask resume];
Solution 4
After downloading the image you need also to place it as a subview from a view, like so:
NSURL *url = [NSURL URLWithString:@"http://img.abc.com/noPhoto4530.gif"];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
UIImageView * myImageView = [[UIImageView alloc] initWithImage:image];
[someOtherView addSubview:myImageView];
[myImageView release];
Solution 5
Download image to a local path on your device then get a UIImage from imageWithContentsOfFile
and use this to set the image in the UIImageView
. Remember to cleanup your image file sometime.
Author by
asedra_le
Updated on May 03, 2020Comments
-
asedra_le almost 4 years
How to create UIImageView with image from a link like this http://img.abc.com/noPhoto4530.gif?
-
Howard about 10 yearsWorks perfect! Cannot imagin that "dataWithContentsOfURL" is in its static method. I'm using Xamarin by the way.
-
Gökhan Çokkeçeci about 10 yearsCan i timeout imageview ? when internet connection is slow application can be crashed so i wants to add timeout @nszombie
-
smirkingman about 9 yearsThe accepted answer is quite old and bad practice anyway. This is the correct answer (with proper error handling of course ;)).
-
MoDJ about 8 yearsYou should note that this is not a great solution because it blocks the main thread waiting for the download. An async loading approach for the data is much better.