爲的NSMutableDictionary無可見接口聲明的選擇的setObject：forkey：

Question

任何人都可以指出我爲什麼會收到編譯錯誤

[objToSend setObject:self.pathidEdit forkey:@"PathId"]; 
[objToSend setObject:indexData forkey:@"data"]; 

在下面的代碼

？

NSMutableArray *indexData = [[NSMutableArray alloc]init]; 

     NSMutableDictionary *dict = [NSMutableDictionary dictionary]; 
     NSMutableDictionary *objToSend = [NSMutableDictionary dictionary]; 

     for(int i=0;i<myPathvideoArray.count;i++) 
     { 


     NSString *vId=[[myPathvideoArray objectAtIndex:i]valueForKey:@"videoId"]; 
    NSNumber *indexNum = [NSNumber numberWithInt:i+1]; 

      [dict setObject:vId forKey: @"VideoId"]; 

      [dict setObject:indexNum forKey: @"index"]; 

      [indexData addObject:dict]; 



     } 

     [objToSend setObject:self.pathidEdit forkey:@"PathId"]; 
     [objToSend setObject:indexData forkey:@"data"]; 

Answer 1

Objective-C的區分大小寫：

這是正確的：

[dict setObject:object forKey:key]; 

雖然這不是：

[dict setObject:object forkey:key];