Question

我想在uiwebview中显示一个字符串，如下所示：

"blah blah blah [IMG]you.png[/IMG] blah blah [IMG]me.png[/IMG]"

我希望它像这样取代：

"blah blah blah <img src=\"you.png\"> blah blah <img src=\"me.png\">"

我已经可以获得[IMG] ... [/ IMG]之间的字符串问题是它只能获得第一组[IMG] ... [/ IMG]而其余的事件不能

NSRange startRange = [finalQuestionString rangeOfString:@"[IMG]"];
if (startRange.location != NSNotFound) {
     NSRange targetRange;
     targetRange.location = startRange.location + startRange.length;
     targetRange.length = [finalQuestionString length] - targetRange.location;   
     NSRange endRange = [finalQuestionString rangeOfString:@"[/IMG]" options:0 
     range:targetRange];
     if (endRange.location != NSNotFound) {
         targetRange.length = endRange.location - targetRange.location;
         NSString *imageFile = [finalQuestionString 
         substringWithRange:targetRange];//the extracted filename
     }
}

那么如何才能获得[IMG] ...... [/ IMG]的所有事件并将其替换为

"<img src=\"file.png\">"

任何帮助将不胜感激。谢谢！

Answer 1

由于[IMG]将永远变为<img src=\"而[/IMG]将永远变为\">"，为什么不这样做：

NSString *originalString = @"blah blah blah [IMG]you.png[/IMG] blah blah [IMG]me.png[/IMG]";
NSString *tempString = [originalString stringByReplacingOccurrencesOfString:@"[IMG]" withString:@"<img src=\""];
NSString *finalString = [tempString stringByReplacingOccurrencesOfString:@"\"[/IMG]" withString:@"\'>'"];

记忆管理留给读者练习：）

在出现之间替换字符串

1 个答案: