从子viewcontroller设置父viewcontroller类的属性值？ | controller设置父viewcontroller类的属性值

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问题描述

有没有人知道如何从子视图（子）视图控制器更新属性值？
我有一个名为statusid的int属性，在父视图控制器中使用gettor / settor定义。
[self.view addSubview：detailsVC.view];

Does anyone know how to update a property value from the subview (child) view controller?I have a int property called statusid defined with gettor/settor in parent view controller.[self.view addSubview:detailsVC.view];

在子子视图中，我尝试调用[super statusid：updatedValue];将statusid更新为新值，但这会产生错误。如何更新父级中的statusid？有人知道怎么做吗？

In the child subview, I trying calling [super statusid:updatedValue]; to update statusid to a new value, but this creates an error. How can i update statusid in the parent? Anyone know how to do this?

推荐答案

用super访问你的基类，你当前的类继承自的基类

with "super" you access your base class, the one your current class has inherited from

要执行您所解释的操作，您需要访问父视图的属性，这是相当复杂的，因为这很可能会因两个类都试图引用而结束彼此。
因此你很可能必须创建一个委托模式，看起来有点像这样

to do what you've explained, you need to access a property of your parent view, which is rather complicated since this will most likely end with both classes trying to reference each other.thus you will most likely have to create a delegate pattern, looking somewhat like this

ParentView.h

@protocol IAmYourFatherAndMotherProtocol

@class ChildView;

@interface ParentView : UIViewController <IAmYourFatherAndMotherProtocol>
{
NSInteger statusID;
}

@property (nonatomic) NSInteger statusID;

@protocol IAmYourFatherAndMotherProtocol
@property (nonatomic) NSInteger statusID;
@end

@end

在ChildView.h中

in ChildView.h

#import "ParentView.h"

@interface ChildView : UIViewController
{
  id<IAmYourFatherAndMotherProtocol> delegate;
}

@property (nonatomic, assign) id <IAmYourFatherAndMotherProtocol> delegate;

在ParentView.m中创建ChildView时，您必须将self设置为委托，例如：

when creating your ChildView in ParentView.m, you have to set "self" as delegate, eg:

ChildView *newChild = [[ChildView alloc] init];
newChild.delegate = self;

通过这样做，您可以在ChildView.m中访问ParentView的statusID，如下所示： / p>

by doing so, you can access "statusID" of your ParentView in ChildView.m like this:

delegate.statusID = 1337;

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