我在两个对象中有两个字符串:
<div align="center"><img src="http://farm9.staticflickr.com/8448/7882675644_76605a2a3d_b.jpg" border="0" alt="" /></div><
<img src="http://farm9.staticflickr.com/8425/7881940452_d2a8e898a3_o.png" border="0" alt="" /><br /><
我正在尝试将链接减去图像。
我通过使用对象方法获得链接:
NSMutableString *string = [NSMutableString stringWithString:description];
int left = [string rangeOfString:@"http://"].location;
int right = 0;
if ([string rangeOfString:@".jpg"].location != NSNotFound) {
right = [string rangeOfString:@".jpg"].location;
}
else if ([string rangeOfString:@".png"].location != NSNotFound){
right = [string rangeOfString:@".png"].location;
}
NSString *sub = [string substringWithRange:NSMakeRange(left, right)];
NSLog(@"%@",sub);
但问题是当我打印出我减去的东西时:
2012-08-29 18:53:30.716 MyApple[56335:c07] http://farm9.staticflickr.com/8448/7882675644_76605a2a3d_b.jpg" border="0" alt="" /></di
2012-08-29 18:53:30.717 MyApple[56335:c07] http://farm9.staticflickr.com/8425/7881940452_d2a8e898a3_o.png" bord
IMO i从http://减去.jpg或.png,但它无法正常工作。
感谢您的帮助。
答案 0 :(得分:3)
NSMakeRange()
的第二个参数是长度,所以你可能需要
NSString *sub = [string substringWithRange:NSMakeRange(left, right - left)];
您还应该看看NSRegularExpression
!