iphone - 替换出现之间的字符串

Question

我想在 uiwebview 中显示一个字符串，它可能如下所示:

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

我想这样替换它:

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

我已经可以得到 [IMG]...[/IMG] 之间的字符串问题是它只能得到第一组 [IMG]...[/IMG] 而其余的不能.

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
     }
}

那么我怎样才能得到所有出现的 [IMG]...[/IMG] 并将其替换为

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

如有任何帮助，我们将不胜感激。谢谢!

Answer 1

自 [IMG]永远会变成<img src=\"和 [/IMG]永远会变成\">" ，为什么不做这样的事情:

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:@"\'>'"];

内存管理留给读者作为练习:)