布尔变量的值不变，不会在情节提要中将dismissViewControllerAnimated从子级更改为父级 [英] Boolean Variable's value not change dismissViewControllerAnimated From Child to Parent in Storyboard

问题描述

我不是初学者，但我无法弄清楚这个愚蠢的问题.我有两个视图控制器，例如 Parent 和 Child 是类. 父级是基类，子级是子类，但是除了这些布尔值，我无法继承任何数据.

I am not a beginner but I can't figure out this silly issue. I have Two View Controllers For Example Parent and Child are classes. Parent is a base class and child is a sub class But I can't Inherited any data except these bool.

在父类中，我使用一个BOOL变量，该变量在 Parent.h

In Parent Class I use one BOOL Variable which I declare in Parent.h

@property (nonatomic, assign) BOOL isChange;  

此后，我合成此变量并在viewDidLoad

After that I synthesis this variable and initialize default False in viewDidLoad

isChange = FALSE;  

现在，我在 Child 类中使用此变量，并将其值更改为True

Now, I use this variable in Child Class and I Change the value to True

Parent.isChange = TRUE;  

在进行此更改之前，我还在 Child 类中的alloc和init Parent 类.

Before this change I also alloc and init Parent Class in Child class.

Parent = [[Parent alloc] init];  

但是问题是当我解雇该班级并转到父级班级isChange值不变时.

But the issue is when I Dismiss this Class and go to Parent Class isChange value not change.

[self dismissViewControllerAnimated:YES completion:nil];  

我签入了父母班级

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    if (isChange == TRUE) {  // Here isChange Return NO.
        [self refresh:nil];
    }
}

我无法弄清楚我的错误.

I can't figure out my mistake.

推荐答案

您无法获得TRUE值，因为在子类中，您的alloc init.它创建一个新的Instance.最好全局声明此布尔变量.我会给你例子.

You can't get TRUE value because in child class your alloc init. It create a new Instance. It's better to declare this Boolean variable Globally. I will give you the Example.

在Common.h

@property (nonatomic) BOOL isChange;  

在Common.m

- (void)checkIsAnyChange:(BOOL)isChange {
    _isChange = isChange;
    [self updateChangeCount:UIDocumentChangeDone];
}  

现在在父级和子级中与此Boolean一起使用以进行检查.

And now use with this Boolean in Parent and Child Class for Check.

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