UI11-事件传递

创建MainViewController继承自UIViewController，创建SubView、MyWindow 继承自UIView

一、在APPDelegate.m中编写代码：

#import "AppDelegate.h"

#import "MyWindow.h"

#import "MainViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    

    self.window = [[MyWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];

    [self.window makeKeyAndVisible];

    //视图要有一个背景颜色才能被触控响应

    [self.window setBackgroundColor:[UIColor redColor]];

    [self.window setRootViewController:[[MainViewController alloc] init]];

    

    return YES;

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

//触控结束

-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

//取消触控

-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

@end

二、在MainViewController.m中编写代码：

#import "MainViewController.h"

#import "SubView.h"

@interface MainViewController ()

@end

@implementation MainViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    [self.view setBackgroundColor:[UIColor lightGrayColor]];

    

    SubView *subView1 = [[SubView alloc] initWithFrame:CGRectMake(20, 50, 100, 100)];

    [subView1 setBackgroundColor:[UIColor blackColor]];

    [subView1 setViewName:@"Black"];

    [self.view addSubview:subView1];

    

    SubView *subView2 = [[SubView alloc] initWithFrame:CGRectMake(200, 200, 100, 100)];

    [subView2 setBackgroundColor:[UIColor greenColor]];

    [subView2 setViewName:@"Green"];

    [self.view addSubview:subView2];

    

    SubView *subView3 = [[SubView alloc] initWithFrame:CGRectMake(0, 0, 50, 150)];

    [subView3 setBackgroundColor:[UIColor yellowColor]];

    [subView3 setViewName:@"Yellow"];

    [self.view addSubview:subView3];

    

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    [super touchesBegan:touches withEvent:event];

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

@end

三、在SubView.m中编写代码

#import "SubView.h"

@implementation SubView

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    [super touchesBegan:touches withEvent:event];

    NSLog(@"%@ %@", self.viewName, NSStringFromSelector(_cmd));

}

@end

四、MyWindow.m

#import "MyWindow.h"

@implementation MyWindow

-(void)touchesBegan:(NSSet<UITouch *>*)touches withEvent:(UIEvent *)event

{

//    [super touchesBegan:touches withEvent:event];

    NSLog(@"%@ %@", [self class], NSStringFromSelector(_cmd));

}

@end