UIWebView，启用触摸保存图像，如在移动Safari中

Question

我想启用保存图像和复制，当用户在我的应用程序中的UIWebView中保持图像。有没有一个属性可以实现这一点，或者我是否需要编写一些特殊的方法来实现这一点？

感谢您的阅读！

Answer 1

您可以通过创建UILongPressGestureRecognizer实例并将其附加到按钮来开始。

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

，然后实现它处理手势的方法

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

//do something 
    } 
} 

Answer 2

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.