網路請求圖片，請求圖片

網路請求圖片，請求圖片

 

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代碼：

- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.            UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(50, 100, 200, 200)];    imageView.backgroundColor=[UIColor redColor];    [self.view addSubview:imageView];                                    [self setImageUrlWithActivityIndicator:@"我愛你!" :imageView];   }//網路請求圖片時，添加loading控制項-(void)setImageUrlWithActivityIndicator:(NSString*)urlString :(UIImageView *)image{    if (![urlString isEqualToString:@""])    {        // __block UIActivityIndicatorView *activityIndicator = nil;        UIActivityIndicatorView *activityIndicator = nil;        activityIndicator = [UIActivityIndicatorView.alloc initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];        [image addSubview:activityIndicator];        CGPoint point = CGPointMake(image.frame.size.width/2, image.frame.size.height/2);        activityIndicator.center = point;        [activityIndicator startAnimating];                [image setImageWithURL:[NSURL URLWithString:[Image_URL stringByAppendingFormat:@"%@",urlString]]              placeholderImage:nil                       success:^(UIImage *image)         {             NSLog(@"...success code here...");             [activityIndicator stopAnimating];             [activityIndicator removeFromSuperview];         }                       failure:^(NSError *error)         {             NSLog(@"... failure code here ...");             [activityIndicator stopAnimating];             [activityIndicator removeFromSuperview];         }];    }}