presentation Controllers的使用(二)

- (IBAction)show:(id)sender {
    SecondViewController *overlay = [[SecondViewController alloc] initWithCountry];
    [self presentViewController:overlay animated:YES completion:nil];
}

- (instancetype)initContentView {
    self = [super init];
    if (self) {
        [self setModalPresentationStyle:UIModalPresentationCustom];
        self.view.backgroundColor = [UIColor clearColor];
        self.contentContainerView = [[UIView alloc] initWithFrame:CGRectMake(20, 200, 280, 200)];
        self.contentContainerView.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.8];
        self.contentContainerView.layer.cornerRadius = 5.0;
        [self.view addSubview:self.contentContainerView];
       
        self.closeButton = [UIButton buttonWithType:UIButtonTypeSystem];
        self.closeButton.frame = CGRectMake(30, 30, 100, 100);
        self.closeButton.tintColor = [UIColor whiteColor];
        self.closeButton.titleLabel.font = [UIFont systemFontOfSize:13];
        [self.closeButton setTitle:@"Close" forState:UIControlStateNormal];
        [self.closeButton addTarget:self action:@selector(closeButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
        [self.contentContainerView addSubview:self.closeButton];
    }
    return self;
}

- (void)closeButtonPressed:(UIButton *)sender {
    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
}