NSString种的实现类

NSString类的实现类


写一个NSString类的实现
+ (id)initWithCString:(c*****t char *)nullTerminatedCString encoding:(NSStringEncoding)encoding; + (id) stringWithCString: (c*****t char*)nullTerminatedCString
encoding: (NSStringEncoding)encoding {
NSString *obj;
obj = [self allocWithZone: NSDefaultMallocZone()];
obj = [obj initWithCString: nullTerminatedCString encoding: encoding]; return AUTORELEASE(obj);
}




问题1，用C语言实现一个revert函数，它的功能是将输入的字符串在原串上倒序后返回。
答案：?int main (int argc, const char * argv[])
{
   
    @autoreleasepool {
        //   用C语言实现一个revert函数，它的功能是将输入的字符串在原串上倒序后返回
      
        char Temp[20]="zhang";
//        gets(Temp);
        char res[20];
        int  k=0;
        int nLen = (int)strlen(Temp);
        for(int i=nLen-1;i>=0;i--)
        { k++;
            res[k]=Temp[i];
            printf("==%c==",Temp[i]);
        }
        NSLog(@"sss===%s",res);
       
    }
    return 0;
}

self._iCarouse.viewpointOffset=CGSizeMake(0,-250);
    self._iCarouse.contentOffset=CGSizeMake(0,-250);
旋转木马~

写一个NSString类的实现
+ (id)initWithCString:(c*****t char *)nullTerminatedCString encoding:(NSStringEncoding)encoding; + (id) stringWithCString: (c*****t char*)nullTerminatedCString
encoding: (NSStringEncoding)encoding {
NSString *obj;
obj = [self allocWithZone: NSDefaultMallocZone()];
obj = [obj initWithCString: nullTerminatedCString encoding: encoding]; return AUTORELEASE(obj);
}