我如何从另一个Viewcontroller调用NStimer形成一个Viewcontroller? [英] How can i call NStimer form one viewcontroller from unother viewcontroller?

问题描述

第一次，我在Third Viewcontroller中这样调用计时器

At first time i call the timer like this in Third viewcontroller

timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(targetMethod) userInfo:nil repeats:NO];

然后将计时器称为targetMethod

Then timer called the targetMethod

-(void)targetMethod
{
 First * sVC = [[First alloc] initWithNibName:@"First" bundle:[NSBundle mainBundle]];
 [self presentModalViewController:sVC animated:YES];
 [sVC release];
 [timer invalidate];
}

第一个viewcontroller打开.在第一个视图控制器中有一个按钮.在按钮动作中我写了

First viewcontroller opened.. In First viewcontroller had one button.In button action i wrote

- (IBAction) Action:(id)sender
{
 [self dismissModalViewControllerAnimated:YES]; 
 Third *BVC=[[Third alloc]init];
    [Bvc TimerStart];       //Timestart is function i start timer in this function..
 //i want to call Third  viewcontroller timer function this place
}

计时器已启动..但是视图没有打开(第一个)viewcontroller .......

timer started..But view didn't open (first )viewcontroller.......

请帮助我......

Please help me......

推荐答案

巴拉，

将NSTimer对象放置在App Delegate .h文件中，并在使用计时器的任何位置包括该.h文件.这将使NSTimer成为全局计时器，您可以从任何其他包含应用程序委托头文件的视图中调用它.

Place the NSTimer object in the App Delegate .h file, include that .h file in wherever you use the timer. This will allow the NSTimer to be a global timer which you can call from any other view that includes the app delegate header file.

在应用程序委托.h文件中(在适当的区域中):

In app delegate .h file (in the appropriate areas):

NSTimer *delayTimer;

@property (nonatomic, retain) NSTimer *delayTimer;

在应用程序委托.m文件中合成该文件(记住要在dealloc中释放它):

Synthesize this in the app delegate .m file (remember to release it in dealloc):

@synthesize delayTimer;

然后在您使用计时器的任何视图中，都可以像这样访问它:

Then in whichever views you use the timer in, access it like this:

// get global variable
SomeNameHereAppDelegate *mainDelegate = (SomeNameHereAppDelegate *)[[UIApplication sharedApplication] delegate];    

mainDelegate.delayTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(targetMethod) userInfo:nil repeats:NO];

然后，当您想从某处使它失效时，只需执行以下操作:

Then when you want to invalidate it from somewhere, you just do this:

[mainDelegate.delayTimer invalidate];
 mainDelegate.delayTimer = nil;

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