iphone - UIWebView，启用触摸保存图像，就像在移动 Safari 中一样

Question

当用户在我的应用程序的 UIWebView 中触摸图像时，我想启用保存图像和复制。是否有一个属性可以实现这一点，或者我需要编写一些特殊的方法来实现这一点？

谢谢阅读！

Answer 1

UIImage * downloadImage = [[UIImage alloc] initWithContentsOfFile:path];
    UIImageWriteToSavedPhotosAlbum(downloadImage,nil, nil, nil);
    [downloadImage release];

    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Saved" message:@"Wallpaper saved to your Gallery." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];

    [alert show];
    [alert release];

Add this whole code to your long press method, it will save your image in gallery.

Answer 2

您可以从创建 UILongPressGestureRecognizer 实例并将其附加到按钮开始。

 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
 [self.button addGestureRecognizer:longPress];
 [longPress release];

然后实现处理手势的方法

 - (void)longPress:(UILongPressGestureRecognizer*)gesture {
if ( gesture.state == UIGestureRecognizerStateEnded ) {
     NSLog(@"Long Press");

 //do something
   }
 }