// 异步下载图片
dispatch_queue_t queue =dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
dispatch_group_t group =dispatch_group_create();
dispatch_group_async(group, queue, ^{
NSData *data = [NSDatadataWithContentsOfURL:[NSURLURLWithString:imageUrl]];
UIImage *image = [UIImageimageWithData:data];
// 保存图片到相册
[PDPhotoGraphToolsaveImageToPhotos:image];
});
@interface PDPhotoGraphTool: NSObject
+ (void)saveImageToPhotos:(UIImage *)savedImage;
+ (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) errorcontextInfo: (void *) contextInfo;
@end
@implementationPDPhotoGraphTool
+(void)saveImageToPhotos:(UIImage *)savedImage
{
UIImageWriteToSavedPhotosAlbum(savedImage,self,@selector(image:didFinishSavingWithError:contextInfo:),NULL);
}
+(void)image:(UIImage *)image didFinishSavingWithError:(NSError *)errorcontextInfo:(void *)contextInfo
{
NSString *msg = nil ;
if(error != NULL){
msg = @"保存图片失败" ;
}else{
msg = @"保存图片成功" ;
}
UIAlertView *alert = [[UIAlertViewalloc] initWithTitle:@"保存图片结果提示"
message:msg
delegate:self
cancelButtonTitle:@"确定"
otherButtonTitles:nil];
[alert show];
}
@end
