How to delete a substring from NSString from a specific position?

Question

I want to set UIWebView with htmlstring and I have problem with an image: ...

<img align="absBottom" alt="" height="350" src="http://www.xyz.com//files/userfiles/images/abc.jpg" vspace="10" width="625" />

...

I want to replace height and width to 200 and 320. I'm using

htmlString = [htmlString stringByReplacingOccurrencesOfString:@"width=\"" withString:@"width=\"320];

then I've got result :

<img align="absBottom" alt="" height="350" src="http://www.xyz.com//files/userfiles/images/abc.jpg" vspace="10" width="320625" />

How to delete the number after the width from htmlString or what is the right way to replace the width to 320px?

score 1 · Accepted Answer · edited Aug 04 '17 at 12:48

1

Try this using NSScanner:

NSScanner *theScanner;
NSString *subStrng =nil;
theScanner = [NSScanner scannerWithString:htmlString];
[theScanner scanUpToString:@"width" intoString:NULL] ;
[theScanner scanUpToString:@" " intoString:&subStrng] ;
htmlString = [htmlString stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@", subStrng] withString::@"width=\"320\""];
NSLog("%@",subStrng);

edited Aug 04 '17 at 12:48

Tamás Sengel

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answered Oct 03 '13 at 11:48

Xcoder

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It works. Thank you. But changes only the first image in html code. – makvalti Oct 03 '13 at 12:05
1

Follow the link - http://stackoverflow.com/questions/6825834/objective-c-how-to-extract-part-of-a-string-e-g-start-with You'l need little modification. – Xcoder Oct 03 '13 at 12:18

score 0 · Answer 2 · answered Oct 03 '13 at 11:15

0

Try this:

htmlString = [htmlString stringByReplacingOccurrencesOfString:@"width=\"625" withString:@"width=\"320];

answered Oct 03 '13 at 11:15

Guy Kogus

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Then you should be using `NSRegularExpression`. – Guy Kogus Oct 03 '13 at 13:16

How to delete a substring from NSString from a specific position?

2 Answers2