从UIViewController的View中触发一个方法 [英] Trigger a method in UIViewController from its View

问题描述

我有一个 UIViewController 及其 UIView ，其中包含 UIButton 。我想在按钮单击事件中触发 UIViewController 中的方法。

保持引用 UIViewController 似乎不是一个好主意，如下面的链接说：
从UIView在iPhone上获取到UIViewController？

I have a UIViewController with its UIView which contains a UIButton. I want to trigger a method in UIViewController on button click event.
Keeping reference of UIViewController doesn't seem to be a good idea like the following link says: Get to UIViewController from UIView on iPhone?

所以我想使用委托achive这个。

So I want to achive this using a delegate. Any hint on how to achieve this?

推荐答案

您可以这样做

CustomView.h

#import <UIKit/UIKit.h>
@protocol CustomViewDelegate <NSObject>

 -(void)didButtonPressed;

@end

 @interface CustomView : UIView

  @property (assign) id<CustomViewDelegate> delegate;

@end

CustomView.m / p>

CustomView.m

#import "CustomView.h"
@implementation CustomView

- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
    // Initialization code
    self.backgroundColor = [UIColor whiteColor];

    //[self addSubview:titleLbl];
    UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button addTarget:self.delegate action:@selector(didButtonPressed) forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"pressMe" forState:UIControlStateNormal];
    [self addSubview:button];


}
return self;
}

<

in your ViewController.m

-(void)loadView
 {
  [super loadView];
  CustomView *view = [[CustomView alloc]initWithFrame:self.view.bounds];
  view.delegate = self;
  [self.view addSubview:view];

 }

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