How to stop NStimer event? [duplicate]

问题:

This question already has answers here:

Closed 7 years ago.

Possible Duplicate:
NSTimer doesn't stop

In my application I am using NStimer to call an animation function every 3 seconds. I want to stop this timer and called another event while the timer is still running. Is this possible?

回答1:

@interface
    NSTimer *autoTimer;

@implementation

// Start timer
    autoTimer = [NSTimer scheduledTimerWithTimeInterval:(3.0)
        target:self 
        selector:@selector(autoTimerFired:) 
        userInfo:nil 
        repeats:YES];

// Stop timer:
    [autoTimer invalidate];
    autoTimer = nil;

回答2:

First, you want to keep a pointer to the timer

self.packetTimer = [NSTimer timerWithTimeInterval:CONNECTION_TIMEOUT target:self selector:@selector(connectionTimeout:) userInfo:nil repeats:NO];
[[NSRunLoop currentRunLoop] addTimer:packetTimer forMode:NSDefaultRunLoopMode];

If somewhere else in your code you want to cancel it, just call:

[self.packetTimer invalidate];
self.packetTimer = nil;