UIWebView，啓用觸摸保存圖像，如在移動Safari中

Question

我想啓用保存圖像和複製，當用戶在我的應用程序中的UIWebView中保持圖像。有沒有一個屬性可以實現這一點，或者我是否需要編寫一些特殊的方法來實現這一點？

感謝您的閱讀！

Answer 1

您可以通過創建UILongPressGestureRecognizer實例並將其附加到按鈕來開始。

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

，然後實現它處理手勢的方法

- (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.