返回上一界面
[self.navigationController popViewControllerAnimated:<#(BOOL)#>];
返回跟视图
[self.navigationController popToRootViewControllerAnimated:<#(BOOL)#>];
返回指定界面（两种）
#pragma mark 第一种
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex: 1] animated:YES];
#pragma mark 第二种
for (UIViewController *controller in self.navigationController.viewControllers) {
if ([controller isKindOfClass:[你要跳转到的Controller class]]) {
[self.navigationController popToViewController:controller animated:YES];
}
}
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