下载网络图片到图库

最新推荐文章于 2019-10-30 09:00:42 发布

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最新推荐文章于 2019-10-30 09:00:42 发布

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原文链接：http://www.cnblogs.com/pingandashen/p/4792316.html

代码介绍：首先开启一个线程请求网络图片，图片下载成功之后保存到相册中。代码简单易懂。

@implementation ViewController

{

NSData *data;

}

- (void)viewDidLoad {

[super viewDidLoad];

UIImageView *imageview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 300, 200)];

[imageview setBackgroundColor:[UIColor grayColor]];

[self.view addSubview:imageview];

dispatch_async(dispatch_get_global_queue(0, 0), ^{

data=[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://image.baidu.com/search/down?tn=download&word=download&ie=utf8&fr=detail&url=http%3A%2F%2Fpic26.nipic.com%2F20121223%2F9252150_195341264315_2.jpg&thumburl=http%3A%2F%2Fimg3.imgtn.bdimg.com%2Fit%2Fu%3D806135425%2C801140138%26fm%3D21%26gp%3D0.jpg"]];

dispatch_async(dispatch_get_main_queue(), ^{

[imageview setImage:[UIImage imageWithData:data]];

UIImageWriteToSavedPhotosAlbum(imageview.image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);

NSLog(@"下载完成1");

});

NSLog(@"下载完成2");

});

NSLog(@"下载完成3");

}

- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo

{

NSString *message = @"呵呵";