如何从URL显示图像并在UIButton上显示？

Question

我想知道如何在点击按钮时显示来自URL（位于xml文件中）的图像。

Answer 1

UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.frame = CGRectMake(20, 20, 200, 44); // position in the parent view and set the size of the button
[myButton setTitle:@"Click Me!" forState:UIControlStateNormal];
// add targets and actions
[myButton addTarget:self action:@selector(buttonClicked) forControlEvents:UIControlEventTouchUpInside];
// add to a view
[superView addSubview:myButton];

点击按钮后的功能

-(void)buttonClicked{
    //urlString should be your image url which you want to access
    NSURL *url = [[NSURL alloc] initWithString:urlString ];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
    NSData *urlData = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:&response error:nil];
    UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];
}

使用想要显示的图像.........

Answer 2

   UIImage *pImage=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:imageURL]]];;
  [imageView setImage:pImage];