figuring out width and height, x and y position of image in UIWebView

Question

So I have a UIWebView and there is an image showed inside it. The question is, is there any way for me to get the width, height, origin-x, origin-y of this image? I have added a UITapGestureRecognizer. What I want is that when I tap on the image, it gives me this information. How can I achieve this?

EDIT: Why doesn't this work:

NSString * widthJs = [NSString stringWithFormat:@"document.getElementById('imageid').clientHeight;"
];
    NSString * heightJs = [NSString stringWithFormat:@"document.getElementById('imageid').clientWidth;"
                          ];

    NSString *width = [self stringByEvaluatingJavaScriptFromString:widthJs];
    NSString *height = [self stringByEvaluatingJavaScriptFromString:heightJs];
     NSLog(@"Coor height is %@ with coor width is %@", width, height);

score 1 · Answer 1 · edited May 23 '17 at 11:48

1

You asked two questions.
Q1: how to interact UIWebView with iOS framework?
stringByEvaluatingJavaScriptFromString is a keyword. and you can find many articles about this by google.
Q2: how to get image informations by javascript?
How to get image size (height & width) using javascript?

edited May 23 '17 at 11:48

Community

1
1

answered Jan 13 '12 at 06:28

xhan

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I am aware of stringByEvaluatingJavaScriptFromString, but not so much about the javascript.. how do I put this together? – xonegirlz Jan 13 '12 at 06:36
also how about the x and y coordinate? – xonegirlz Jan 13 '12 at 06:57

figuring out width and height, x and y position of image in UIWebView

1 Answers1