如何从ios中的uiwebview获取图像 [英] How to get the image from uiwebview in ios

问题描述

这里我加载了内容以及webview中的图像，我想从webview中获取图像并将其加载到imageview中。

here i loaded the content as well as the images in the webview, i want to take the image from the webview and load it into the imageview.

url收到图像，但图像没有加载到imageview

the url of the image is received but the image is not loaded it in to the imageview

这里我使用代码从webview获取图片

here i use the code for taking the image from webview is

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    //Touch gestures below top bar should not make the page turn.
    //EDITED Check for only Tap here instead.
    if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
        CGPoint touchPoint = [touch locationInView:self.view];

        NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
        bool pageFlag = [userDefaults boolForKey:@"pageDirectionRTLFlag"];
        NSLog(@"pageFlag tapbtnRight %d", pageFlag);

        if(self.interfaceOrientation==UIInterfaceOrientationPortrait||self.interfaceOrientation==UIInterfaceOrientationPortraitUpsideDown) {
  NSString *imgURL = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).src", touchPoint.x, touchPoint.y];
            NSString *urlToSave = [webView stringByEvaluatingJavaScriptFromString:imgURL];
            NSLog(@"urlToSave :%@",urlToSave);
}
}

推荐答案

检查这个。

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
NSLog(@"TAPPED");
//Touch gestures below top bar should not make the page turn.
//EDITED Check for only Tap here instead.
if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
    CGPoint touchPoint = [touch locationInView:self.view];

    NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
    bool pageFlag = [userDefaults boolForKey:@"pageDirectionRTLFlag"];
    NSLog(@"pageFlag tapbtnRight %d", pageFlag);

    if(self.interfaceOrientation==UIInterfaceOrientationPortrait||self.interfaceOrientation==UIInterfaceOrientationPortraitUpsideDown) {
        NSString *imgURL = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).src", touchPoint.x, touchPoint.y];
        NSString *urlToSave = [webV stringByEvaluatingJavaScriptFromString:imgURL];
        NSLog(@"urlToSave :%@",urlToSave);
        NSURL * imageURL = [NSURL URLWithString:urlToSave];
        NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
        UIImage * image = [UIImage imageWithData:imageData];
        imgView.image = image;//imgView is the reference of UIImageView
    }
  }
return YES;
}

示例代码：
http://dl.dropbox.com/u/51367042/ImageFromWebView.zip

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