NSString 截取字符串

NSString 对字符串的一些操作

    1.截取字符串    NSString*string =@"sdfsfsfsAdfsdf";    string = [string substringToIndex:7];//截取掉下标7之后的字符串    NSLog(@"截取的值为：%@",string);    [string substringFromIndex:2];//截取掉下标2之前的字符串    NSLog(@"截取的值为：%@",string);    2.匹配字符串    NSString*string =@"sdfsfsfsAdfsdf";    NSRangerange = [string rangeOfString:@"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