iOS NSString 字符串处理：截取字符串、匹配字符串、分隔字符串

1.截取字符串

NSString*string =@"sdfsfsfsAdfsdf"; string = [string substringToIndex:7];//截取下标7之后的字符串 NSLog(@"截取的值为：%@",string); [string substringFromIndex:2];//截取下标2之前的字符串 NSLog(@"截取的值为：%@",string);

2.匹配字符串 NSString*string =@"sdfsfsfsAdfsdf"; NSRangerange = [stringrangeOfString:@"f"];//匹配得到的下标 NSLog(@"rang:%@",NSStringFromRange(range)); string = [string substringWithRange:range];//截取范围类的字符串 NSLog(@"截取的值为：%@",string);

3.分隔字符串 NSString*string =@"sdfsfsfsAdfsdf";

NSArray *array = [string componentsSeparatedByString:@"A"]; //从字符A中分隔成2个元素的数组 NSLog(@"array:%@",array); //结果是adfsfsfs和dfsdf