Ios 从其他视图更改标签

这主要是一个授权问题，因为我还在学习，不明白。我不知道如何着手创建我需要的代理

我知道有人问过类似的问题，但解决方案对我没有帮助。如何将视图1上标签的文本与视图2上UITextField的内容切换

---

谢谢

在此代码段中，ChildViewController是您的View2，ParentViewController是您的View1

在ChildViewController.h文件中：

@protocol ChildViewControllerDelegate <NSObject>
- (void)parentMethodThatChildCanCall:(NSString *)string;  //pass back the string value from your textfield
@end

@interface ChildViewController : UIViewController 
{
    @property (weak, nonatomic) IBOutlet UITextField *myTextField;
}
@property (assign) id <ChildViewControllerDelegate> delegate;

@interface parentViewController <ChildViewControllerDelegate>
{
    @property (strong, nonatomic) IBOutlet UILabel *myLabel;
}

在ParentViewController.h文件中：

@protocol ChildViewControllerDelegate <NSObject>
- (void)parentMethodThatChildCanCall:(NSString *)string;  //pass back the string value from your textfield
@end

@interface ChildViewController : UIViewController 
{
    @property (weak, nonatomic) IBOutlet UITextField *myTextField;
}
@property (assign) id <ChildViewControllerDelegate> delegate;

@interface parentViewController <ChildViewControllerDelegate>
{
    @property (strong, nonatomic) IBOutlet UILabel *myLabel;
}