背景：在pushViewController之后把之前的vc删掉
先上代码
UIViewController *tempVC = [[UIViewController alloc] init];
[self.navigationController pushViewController:tempVC animated:YES];
NSMutableArray * subVCs = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];
for (int i=0; i<subVCs.count; i++) {
if ([subVCs[i] isKindOfClass:[XXX class]]) {
[subVCs removeObjectAtIndex:i];
}
}
[self.navigationController setViewControllers:subVCs animated:YES];
大家一般都是这样做，可是，但是，pushViewController执行之后，有一定概率self.navigationController.viewControllers没有你刚才push的vc，这就是坑，它不是立马入栈的。
解决方法，很简单
- 设置代理
self.navigationController.delegate = self; - 实现代理函数
NSMutableArray * subVCs = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];
for (int i=0; i<subVCs.count; i++) {
if ([subVCs[i] isKindOfClass:[XXX class]]) {
[subVCs removeObjectAtIndex:i];
}
}
[self.navigationController setViewControllers:subVCs animated:YES];
嗯，是不是很简单。
