Ios 一段时间后从NSMutableDictionary中删除对象

我想在一段时间后从NSMutableDictionary中删除一些对象

我有：

//first Method start
    PedObjectTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(fireTimer:) userInfo:PedMessage repeats:YES];
    [PedMessage setObject:PedObjectTimer forKey:@"Timer"];
    [PedObjects setObject:[PedMessage copy] forKey:[PedMessage objectForKey:@"ObjectID"]];
//first Method end



- (void) fireTimer:(NSTimer*)theTimer {

    NSLog(@"%@",PedObjects);
    [PedObjects removeObjectForKey:[[theTimer userInfo]objectForKey:@"ObjectID"]];
    NSLog(@"%@",PedObjects);

    [theTimer invalidate];
    theTimer = nil;
}

问题是我无法将计时器对象复制到字典

[PedObjects setObject:[PedMessage copy] forKey:[PedMessage objectForKey:@"ObjectID"]];
[self performSelector:@selector(delete:) withObject:[PedObjects objectForKey:[PedMessage objectForKey:@"ObjectID"]] afterDelay:2.0];


-(void)delete:(NSMutableDictionary*)dict
{
    NSLog(@"%@",[PedMessage objectForKey:@"ObjectID"]);
    NSLog(@"%@",PedObjects);
    [PedObjects removeObjectForKey:[dict objectForKey:@"ObjectID"]];
    NSLog(@"%@",PedObjects);

}

在fireTimer方法中，如何在2秒后删除正确的一个

这样我得到了相同的结果，如果我有2个选择器，它将不会删除我字典中的2个条目

[PedObjects setObject:[PedMessage copy] forKey:[PedMessage objectForKey:@"ObjectID"]];
[self performSelector:@selector(delete:) withObject:[PedObjects objectForKey:[PedMessage objectForKey:@"ObjectID"]] afterDelay:2.0];


-(void)delete:(NSMutableDictionary*)dict
{
    NSLog(@"%@",[PedMessage objectForKey:@"ObjectID"]);
    NSLog(@"%@",PedObjects);
    [PedObjects removeObjectForKey:[dict objectForKey:@"ObjectID"]];
    NSLog(@"%@",PedObjects);

}

---

您可以使用以下内容：

而不是计时器，你打电话

[self performSelector:@selector(delete:) withObject:yourDictionary afterDelay:2.0];

//delete implementation

-(void)delete:(NSMutableDictionary*)dict {
    [dict removeObjectForKey:@"yourKey"];
}

---

您可以使用以下内容：

而不是计时器，你打电话

[self performSelector:@selector(delete:) withObject:yourDictionary afterDelay:2.0];

//delete implementation

-(void)delete:(NSMutableDictionary*)dict {
    [dict removeObjectForKey:@"yourKey"];
}

---

现在我也有同样的问题，如果我有两个选择器，它将不会删除我字典中的两个条目…@Phil:你说的两个选择器是什么意思？类似但更简单的可能是：[dict performSelector:@selector（removeObjectForKey:）with object:@“yourKey”afterDelay:2.0]；现在我也有同样的问题，如果我有两个选择器，它将不会删除我字典中的两个条目…@Phil:你说的两个选择器是什么意思？类似但更简单的可能是：[dict performSelector:@selector（removeObjectForKey:）with object:@“yourKey”afterDelay:2.0]；