使用UIView中的presentViewController [英] Using presentViewController from UIView

问题描述

我正在为我的iOS应用程序创建一个标题栏，我在UIView中创建它。我唯一的问题是主页按钮。按下主页按钮时，需要转到主页，即ViewController。

I am creating a title bar for my iOS application and I am making this inside a UIView. The only issue I am having is with the "home button". When the home button is pressed, it needs to go to the home page, which is ViewController.

然而，它看起来不像 [self presentViewController：vc animated：NO completion：NULL]; 适用于UIView。

However, it doesn't look as if [self presentViewController:vc animated:NO completion:NULL]; works for UIView.

如何解决此问题？

- (void) createTitlebar {

    CGRect titleBarFrame = CGRectMake(0, 0, 320, 55);

    //Create the home button on the top right of the page. When clicked, it will navigate to the home page of the application
    homeButton = [UIButton buttonWithType:UIButtonTypeCustom];
    homeButton.frame = CGRectMake(275, 10, 40, 40);
    [homeButton setTag:1];
    [homeButton setImage:[UIImage imageNamed:@"homeIcon.png"] forState:UIControlStateNormal];
    [homeButton addTarget:self action:@selector(homeButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:homeButton];
}

- (IBAction)homeButtonPressed:(id)sender{

    //Transition to the submit button page
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"ViewController"];
    [vc setModalPresentationStyle:UIModalPresentationFullScreen];
    [self presentViewController:vc animated:NO completion:NULL];
}

推荐答案

只有UIViewController可以呈现另一个视图控制器，所以如果你需要从视图中显示一个viewcontroller有几种方法，其中一种是这样的：

Only UIViewController can present another view controller, so if you need to show a viewcontroller from view there are several way, one of them is like this:

制作一个你父视图所在的viewcontroller代表它

make a viewcontroller on which your parent view is situated a delegate of it

ParentView *view = [ParentView new];
...
view.delegate = self;

然后，在该委托的ParentView调用方法中

then, inside ParentView call method of that delegate

- (IBAction)homeButtonPressed:(id)sender {
    [self.delegate buttonPressed];
}

然后，在VC工具中

 -(void)buttonPressed {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"ViewController"];
    [vc setModalPresentationStyle:UIModalPresentationFullScreen];
    [self presentViewController:vc animated:NO completion:NULL];
}

如果您需要将此代码保留在UIView中并避免委派，您可以执行像这样的伎俩（我个人不喜欢它，但它应该工作）

If you need to keep this code inside UIView and avoid delegation you can do a trick like this (personally i don't like it but it should work)

-(void)buttonPressed{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController *vc = [storyboard      instantiateViewControllerWithIdentifier:@"ViewController"];
    [vc setModalPresentationStyle:UIModalPresentationFullScreen];
    [(UIViewController*)self.nextResonder presentViewController:vc animated:NO completion:NULL];
}

这篇关于使用UIView中的presentViewController的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！