详解iOS中Button按钮的状态和点击事件

添加MyView作为自身view

#import "MyViewController.h"
#import "MyView.h"

@interface MyViewController ()

@property (strong, nonatomic) MyView *myview;

@end

@implementation MyViewController

- (void)loadView
{
 MyView *myView = [[MyView alloc] initWithFrame: [[UIScreen mainScreen] bounds] ];
 self.view = myView;
 self.myview = myView;
 
 //在controller中设置按钮的目标-动作，其中目标是self，也就是控制器自身，动作是用目标提供的BtnClick:方法，
 [self.myview.myBtn addTarget:self
    action:@selector(BtnClick:)
  forControlEvents:UIControlEventTouchUpInside];
}

//MyView中的按钮的事件
- (void)BtnClick:(UIButton *)btn
{
 NSLog(@"Method in controller.");
 NSLog(@"Button clicked.");
}

 #import "AppDelegate.h"
#import "MyViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 
 self.window = [ [UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds ] ];
 
 MyViewController *myVC = [[MyViewController alloc] init];
 self.window.rootViewController = myVC;
 
 self.window.backgroundColor = [UIColor whiteColor];
 [self.window makeKeyAndVisible];
   
 return YES;
}