我想在我的应用程序中添加注销功能，以便用户在自上次屏幕触摸后的不活动/空闲时间得到注销。
请建议我实现此功能的方法。
有些人告诉你在你的代码中添加这个；
- (void)sendEvent:(UIEvent *)event {
[super sendEvent:event];
// Only want to reset the timer on a Began touch or an Ended touch, to reduce the number of timer resets.
NSSet *allTouches = [event allTouches];
if ([allTouches count] > 0) {
// allTouches count only ever seems to be 1, so anyObject works here.
UITouchPhase phase = ((UITouch *)[allTouches anyObject]).phase;
if (phase == UITouchPhaseBegan || phase == UITouchPhaseEnded)
[self resetIdleTimer];
}
}
- (void)resetIdleTimer {
if (idleTimer) {
[idleTimer invalidate];
[idleTimer release];
}
idleTimer = [[NSTimer scheduledTimerWithTimeInterval:maxIdleTime target:self selector:@selector(idleTimerExceeded) userInfo:nil repeats:NO] retain];
}
- (void)idleTimerExceeded {
NSLog(@"idle time exceeded");
}
但我的问题是在哪里添加这段代码。
最佳答案
摆脱所有计时器代码，只需执行此操作即可。当用户点击时，安排您的空闲方法在 X 秒后调用(使用 performSelector: afterDelay:)。每当他们点击时，取消所有计划的请求(使用 cancelPreviousPerformRequestsWithTarget:)并在 X 秒内请求一个新请求。
int secondsUntilTimeout = 120;//time you want until they time-out.
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(idleTimerExceeded) object:nil];//cancel all previously scheduled time-out requests
[self performSelector:@selector(idleTimerExceeded) withObject:nil afterDelay:secondsUntilTimeout];//schedule a new time-out request
因此您的最终代码将如下所示:
- (void)sendEvent:(UIEvent *)event {
[super sendEvent:event];
NSSet *allTouches = [event allTouches];
if ([allTouches count] > 0) {
UITouchPhase phase = ((UITouch *)[allTouches anyObject]).phase;
if (phase == UITouchPhaseBegan || phase == UITouchPhaseEnded) {
int secondsUntilTimeout = 120;//time you want until they time-out.
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(idleTimerExceeded) object:nil];//cancel all previously scheduled time-out requests
[self performSelector:@selector(idleTimerExceeded) withObject:nil afterDelay:secondsUntilTimeout];//schedule a new time-out request
}
}
}
- (void)idleTimerExceeded {
NSLog(@"idle time exceeded");
}
关于ios - 如何在检测到自上次屏幕触摸后用户不活动/空闲时间时注销应用程序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45474943/