Question

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。

接收图像的网址，但图像未加载到图像视图

这里我使用代码从webview获取图像

-(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);
}
}

Answer 1

检查一下。

-(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

如何从ios中的uiwebview获取图像

1 个答案: