English 中文(简体)
A. 创立一个时代
原标题:Creating an iOS Timer

我正试图建立“站式观察”型功能。 我有一个标签(显示过去的时间)和两个纽州(起步和停止时间)。 起步和起步的纽托分别称为<条码>启程/代码>和<条码>止时/代码>。 每秒钟点火,并打电话<代码>increasetimerCount。 我还有一张“ivar timerCount,该编码在第二秒中一直保持。

- (void)increaseTimerCount
{
    timerCountLabel.text = [NSString stringWithFormat:@"%d", timerCount++];
}

- (IBAction)startTimer
{
    timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(increaseTimerCount) userInfo:nil repeats:YES];

}

- (IBAction)stopTimer
{
    [timer invalidate];
    [timer release];
}

问题在于,当开始纽特时,似乎出现拖延(我假定这是每次开工时都要重新启用时间)。 是否有任何办法可以暂停和恢复时间,而同时又不使其失效和收回? 或者采取更好/替代的办法?

感谢。

最佳回答

You can t pause the timer without using invalidate. What you can do is add

[timer fire];

页: 1

问题回答

参照标准,但如果某人仍然感兴趣......

不要“停工”,而是停止在停工期间加油,例如。

- (void)increaseTimerCount
{
   if (!self.paused){
      timerCount++
   }

   timerCountLabel.text = [NSString stringWithFormat:@"%d", timerCount];
}




相关问题
Asynchronous request to the server from background thread

I ve got the problem when I tried to do asynchronous requests to server from background thread. I ve never got results of those requests. Simple example which shows the problem: @protocol ...

objective-c: Calling a void function from another controller

i have a void, like -(void) doSomething in a specific controller. i can call it in this controller via [self doSomething], but i don t know how to call this void from another .m file. I want to call ...

ABPersonViewController Usage for displaying contact

Created a View based Project and added a contact to the AddressBook using ABAddressBookRef,ABRecordRef now i wanted to display the added contact ABPersonViewController is the method but how to use in ...

NSArray s, Primitive types and Boxing Oh My!

I m pretty new to the Objective-C world and I have a long history with .net/C# so naturally I m inclined to use my C# wits. Now here s the question: I feel really inclined to create some type of ...

NSUndoManager and runModalForWindow:

I have a simple Core Data app which displays a list of entities in the main window. To create or add new entities, I use a second modal window with a separate managed object context so changes can be ...

NSMutableArray values becoming "invalid"

I m trying to show a database information in a tableview and then the detailed information in a view my problem is as follow: I created a NSMutableArray: NSMutableArray *myArray = [[NSMutableArray ...

iPhone numberpad with decimal point

I am writing an iPhone application which requires the user to enter several values that may contain a decimal point (currency values, percentages etc.). The number of decimal places in the values ...

热门标签