ios - NSTimer 选择器没有被调用

Question

我编写了以下代码来运行NSTimer。但是 NSTimer 选择器没有被调用。

.h 文件

@interface XViewController : UIViewController {
   NSTimer *repeatServerRequest;
}

@property(nonatomic, retain) NSTimer *repeatServerRequest;

- (void)checkForMinimunOnetimePinEntry;
- (void) initializeTimer;
- (void)stopTimer;

.m文件

@synthesize repeatServerRequest;

- (void)checkForMinimunOnetimePinEntry {
   // some code
}

- (void) initializeTimer {
    repeatServerRequest = [NSTimer scheduledTimerWithTimeInterval:15.0
                                    target:self
                                    selector:@selector(checkForMinimunOnetimePinEntry)
                                    userInfo:nil
                                    repeats:YES];
}

- (void)stopTimer {
    [repeatServerRequest invalidate];
    [repeatServerRequest release];
    repeatServerRequest = nil;

//    [self.repeatServerRequest invalidate];
//    [self.repeatServerRequest release];
//    self.repeatServerRequest = nil;
}

我做错了什么？

还请回答我哪个是正确的:self.repeatServerRequest 还是简单的repeatServerRequest？提前致谢!

Answer 1

问题在于您将计时器分配给类字段，而不是属性。

要使此代码正常工作，只需将 self. 放在 repeatServerRequest = 之前。

当您使用self.repeatServerRequest时，编译器会调用[self setRepeatServerRequest:...]并保留自动释放的计时器。