1、字符串的截取
//1.截取字符串
NSString *string=@"123456d890";
NSString *str1 = [stringsubstringToIndex:5];//截取掉下标5之前的字符串NSLog(@"截取的值为：%@",str1);
NSString *str2 = [stringsubstringFromIndex:3];//截取掉下标3之后的字符串NSLog(@"截取的值为：%@",str2);
2、匹配字符串
从字符串(sd是sfsfsAdfsdf)中查找(匹配)字符串(Ad)
//2.匹配字符串NSString *string=@"sd是sfsfsAdfsdf";
NSRange range = [stringrangeOfString:@"Ad"];//匹配得到的下标NSLog(@"rang:%@",NSStringFromRange(range));string= [stringsubstringWithRange:range];//截取范围内的字符串NSLog(@"截取的值为：%@",string);
3、字符串分割
根据字符串中的某个字符(A)来分割字符串
//3.分隔字符串NSString *string=@"sdfsfsfsAdfsdf";
NSArray *array = [stringcomponentsSeparatedByString:@"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
