Modal跳转用法

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一般在使用Modal视图跳转的时候，都包含一个导航控制器

- (IBAction)jump {    // 展示MJTwoViewController    PANTwoViewController *two = [[PANTwoViewController alloc] init];        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:two];        [self presentViewController:nav animated:YES completion:^{        NSLog(@"展示PANTwoViewController完毕.......");    }];}

PANTwoViewController.m

- (void)viewDidLoad{    [super viewDidLoad];        self.title = @"第2个控制器";//    self.navigationItem.title    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStyleDone target:self action:@selector(cancel)];}

- (IBAction)cancel {//    NSLog(@"%@", self.view.window.rootViewController);//    NSLog(@"%@", self.view.window.subviews);    [self dismissViewControllerAnimated:YES completion:^{        NSLog(@"关闭PANTwoViewController....");    }];//与上面等价//    [self.navigationController dismissViewControllerAnimated:YES completion:^{//        NSLog(@"关闭PANTwoViewController....");//    }];}

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