iOS 双击tabbar刷新页面

/*在继承UITabBarController控制器中*/

#pragma mark <UITabBarControllerDelegate>

-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{

if ([self doubleClick]) {

UINavigationController *navigation =(UINavigationController *)viewController;

if ([navigation.topViewController respondsToSelector:@selector(tabbarDoubleClick)]) {

[navigation.topViewController performSelector:@selector(tabbarDoubleClick)];

}

}

}

/*判断是否是双击(因为系统并没有提供双击的方法, 可以通过点击的时间间隔来判断)*/

- (BOOL)doubleClick {

NSDate *date = [NSDate date];

if (date.timeIntervalSince1970 - self.lastDate.timeIntervalSince1970 < 0.5) {

//完成一次双击后，重置第一次单击的时间，区分3次或多次的单击

self.lastDate = [NSDate dateWithTimeIntervalSince1970:0];

return YES;

}

self.lastDate = date;

return NO;

}

#prama mark - 实现代理方法

/*在需要刷新的界面*/

- (void)tabbarDoubleClick {

}