NSDictionary returns nil for NSNumber

Question

我正在使用gamekit发送nsdictionary中的nsnumber。当我NSlog字典时，数字是可以的，但当我尝试获取NSNumber时，它总是（null）。

NSMutableDictionary *dict = [NSKeyedUnarchiver  unarchiveObjectWithData:data];
NSNumber *receivedHostNum = (NSNumber*)[dict objectForKey:@"h"];
if (gameStarted == NO){
    NSLog(@"%@",dict);
    NSLog(@"My Num:%i",[hostNum intValue]);
    NSLog(@"%@",receivedHostNum);
    NSLog(@"Recieved Num:%i",[receivedHostNum intValue]);
    if ([hostNum intValue]>[receivedHostNum intValue])
        NSLog(@"You are host");
    else
        NSLog(@"You are client");
}

这是日志：

2012-08-21 14:34:06.067 PeerPicker[6667:c07] {
    "-589267889" = h;
}
2012-08-21 14:34:06.068 PeerPicker[6667:c07] My Num:-2142897577
2012-08-21 14:34:06.068 PeerPicker[6667:c07] (null)
2012-08-21 14:34:06.069 PeerPicker[6667:c07] Recieved Num:0
2012-08-21 14:34:06.069 PeerPicker[6667:c07] You are client

Answer 1

我想你把号码放错字典了。您的日志显示：

2012-08-21 14:34:06.067 PeerPicker[6667:c07] {
    "-589267889" = h;
}

应该是：

2012-08-21 14:34:06.067 PeerPicker[6667:c07] {
    "h" = -589267889;
}

在构造数组或存储数组时，您已经反转了键和对象。