点击并按住以在UIWebview中保存图像 [英] Tap and hold to save image in UIWebview

问题描述

在我的应用程序中，我有一个显示图片列表的UIWebView。现在，当有人用手指敲击图片时，可以选择复制该图片。

In my app I have a UIWebView that shows a list of pictures. Right now, when someone taps and holds their finger on a picture, the option comes up to copy that picture.

有没有办法让人们点击并按住保存该图片的选项？

Is there a way to make it so that, when someone taps and holds, the option to save that picture appears?

欢迎任何想法！

推荐答案

你需要检测长龙头。为此你需要添加：

You need to detect the long tap. For that you need to add:

 @property (nonatomic,strong) UILongPressGestureRecognizer *lpgr;

并在您的视图中加载：

  self.lpgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGestures:)];
self.lpgr.minimumPressDuration = 1.0f;
self.lpgr.allowableMovement = 100.0f;

[self.view addGestureRecognizer:self.lpgr];

并要求用户在应用检测到长按后保存图片。

and ask the user to save the picture once the app detects the long tap.

   - (void)handleLongPressGestures:(UILongPressGestureRecognizer *)sender
{
    if ([sender isEqual:self.lpgr]) {
        if (sender.state == UIGestureRecognizerStateBegan)
        {  
           //prompt the user to save the picture .
        }
    }
}

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