ios中将NSString类型转化为NSMutableDictionary类型

例如：NSString=@"id=123&name=csdn&age=1&content=what&";

-(NSMutableDictionary *)changeStringToDictionary:(NSString *)string{

  NSMutableDictionary *returnDic=[[[NSMutableDictionary  alloc]  init]  autorelease];

    

    NSArray *parmArray=[stringcomponentsSeparatedByString:@"&"];//将字符串切割为数组

    NSLog(@"count:%d",parmArray.count);//count=4,格式是：[id=123,name=csdn,age=1,content=what],其中id，name，age，content对应的下标分别是0，1，2，3

    for (NSString *sStringinparmArray) {//遍历parmArray里面的每一个元素

        

        NSArray *sArray=[sString componentsSeparatedByString:@"="];//id=3被拆成数组：[id,3];id和3对应的下标分别为0，1

        [returnDic setObject:[sArray objectAtIndex:1] forKey:[sArrayobjectAtIndex:0]];//组成键值对

        

    }

    return returnDic;

    

}