标签: object-state

我想创建轻型对象数据包以在客户端和服务器应用程序之间传递.

这是一个如此简单的任务,我只能控制1个字节,因此一个字节中的每个位都有不同的含义,

仅使用位

0 = False 
1 = True

Itens我现在需要:

1 - Loaded from database 
2 - Persisted
3 - Changed
4 - Marked to Delete
5 -
6 - 
7 - Null Value 
8 - Read Only


1) How do I use bit operators in Delphi to check each bit value? 
2) How do I set the bit Values?

解

在所有帮助之后,我会使用下一个Set

  TStateType = (
    stLoaded    = 0,   // loaded from persistance
    stNative    = 2,   // value loaded and converted …

我有一个NSTimer我想每秒更新一个标签.我的代码是:

- (IBAction)OnClickEmergencyButton:(id)sender
{
    emergencyAlertTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(emergencyTimer) userInfo:nil repeats:YES];
    [emergencyAlertTimer fire];
}

- (void)emergencyTimer
{
    int i = 0;
    _emergencyAlertTriggerTimerLabel.text = [NSString stringWithFormat:@"%d", ++i];
}

当我运行它时,标签最初显示为"1"然后停止.

我希望标签每秒都能连续计数,比如"1","2","3"......