Ios 从UIActionSheet类中解除UIViewController

我创建了一个

UIActionSheet

类，它允许我从应用程序中的任何位置注销。我遇到的问题是，一旦我按下注销按钮，它还应该关闭当前的

viewController

，并返回登录

viewController

。下面是我的代码片段

NSObject.h file 

@interface constants : NSObject<UIActionSheetDelegate>{

    UIActionSheet *msg;

}

-(void)presentMyActionSheet;
@property (nonatomic, strong) UIView *viewForActionSheet;


NSObject.m file

-(void)presentMyActionSheet{

msg = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Log Out" otherButtonTitles:nil, nil];

[msg showInView:self.viewForActionSheet];

}
// actionsheet delegate protocol item
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex: (NSInteger)buttonIndex{

    NSLog(@"button index = %ld", (long)buttonIndex);
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if(buttonIndex == 0){
                [defaults setObject:nil forKey:@"acctInfo"];
                [defaults setBool:NO forKey:@"isLoggedOn"];

                NSLog(@"You logged out");

它不起作用

            }else{

                NSLog(@"You canceled logout");
            }

}

 viewController.h file

@interface viewController : UIViewController<UIActionSheetDelegate>

@property(nonatomic, retain)constants *obj;


viewController.m file

@synthesize obj;

{
    self.obj = [[constants alloc] init];
    self.obj.viewForActionSheet = self.view;
    [self.obj presentMyActionSheet];

    if([defaults boolForKey:@"isLoggedOn"]){

If I try it from here it crashes.
     //   [self.navigationController popViewControllerAnimated:NO];
     //   [self dismissViewControllerAnimated:NO completion:nil];

    }
}

}其他{
NSLog（@“您已取消注销”）；
}
}
viewController.h文件
@界面viewController:UIViewController
@属性（非原子，保留）常数*obj；
viewController.m文件
@合成obj；
{
self.obj=[[constants alloc]init]；
self.obj.viewForActionSheet=self.view；
[self.obj presentMyActionSheet]；
if（[默认布尔工作：@“isLoggedOn”]）{
如果我在这里尝试，它会崩溃。
//[self.navigationController PopViewControllerInitiated:否]；
//[自我解除视图控制器激活：未完成：无]；
}
}

关于它为什么不起作用有什么建议吗

---

谢谢

试试这样的方法：

[self.viewForActionSheet.navigationController popToRootViewControllerAnimated:YES];

---

您应该在对象类中为自己的委托使用NSNotification。

您可以使用UIActionSheetDelegate方法

-（void）actionSheet:（UIActionSheet*）actionSheet didDismissWithButtonIndex:（NSInteger）buttonIndex

例如：

 -(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex{

    if (buttonIndex == 1) {
        [self.navigationControllerler dismissModalViewControllerAnimated:YES];}}

---

你是否尝试过先关闭操作表，然后弹出视图控制器？@pnavk是的，当我尝试应用程序崩溃时。

 -(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex{

    if (buttonIndex == 1) {
        [self.navigationControllerler dismissModalViewControllerAnimated:YES];}}