获取当前控制器，封装方法可直接调用

                                                    


实际开发中，经常会遇到弹窗，在弹窗中有点击事件，然后跳转到指定页面。比如当前页面，点击上架，会显示弹窗显示当前上架总数，并且右边按钮可以跳转到店铺页面。那么问题来了。通常情况下这种弹窗都是一个view加在当前keywindow上。先来看一下弹窗的源码，在访问请求成功的情况下，将我们分装好的putawayview放到key window上if ([dic[kFlag] isEqualToString:@"1"]) {

[SSGOTools showInfoPopHint:@"上架成功"];

PutAwayView * view = [[PutAwayView alloc]initWithFrame:CGRectMake(0,kScreenHeight -91 -X_HOME_INDICATOR_HEIGHT, kScreenWidth , 91 )];
[view updateViewWithBean:dic[kMsg]];
__weak PutAwayView * weakView = view;
weakView.shopblock = ^(NSInteger tag) {
if (tag == 102) {

ShopListVC *vc = [ShopListVC new];
[[SSGOTools getCurrentViewController].navigationController pushViewController:vc animated:YES];
}
};
UIWindow *window = [[UIApplication sharedApplication]keyWindow];
[window addSubview:view];

dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC));
dispatch_after(delayTime, dispatch_get_main_queue(), ^{
[view removeFromSuperview];
});

}通过view的block回调，我们推出一个新的页面。到店铺页面。那么如何获得当前的window背后显示的控制器呢？这里需要一个方法，已经封装成类方法，拿来直接用即可，代码如下：+(UIViewController *)getCurrentViewController
{
return [SSGOTools topViewControllerWithRootViewController:[[UIApplication sharedApplication].keyWindow rootViewController]];
}

+ (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController
{
if ([rootViewController isKindOfClass:[RDVTabBarController class]]) {
RDVTabBarController *tabBarController = (RDVTabBarController *)rootViewController;
return [SSGOTools topViewControllerWithRootViewController:tabBarController.selectedViewController];
} else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController* navigationController = (UINavigationController*)rootViewController;
return [SSGOTools topViewControllerWithRootViewController:navigationController.visibleViewController];
}
4000
else if (rootViewController.presentedViewController) {
UIViewController* presentedViewController = rootViewController.presentedViewController;
return [SSGOTools topViewControllerWithRootViewController:presentedViewController];
} else if ( [rootViewController isKindOfClass:[UIPageViewController class]]){
UIPageViewController * pageViewController = (UIPageViewController*)rootViewController;
return pageViewController.viewControllers[0];

}else {
return rootViewController;
}
}