如何在情节提要中的 UIViewControllers 之间手动切换?

问题描述

我只需要使用代码手动查看同一故事板文件中的 UIView 控制器.我使用故事板来制作所有形式和连接.我的应用程序从导航控制器开始，它让我可以访问 UIView (LoginViewController)，然后它进入标签栏控制器，它提供 4 个 UIViews.根据每个 UIView 我有 .h 和 .m 文件.我知道segue方法，它很简单，但我需要手动方法.也许我做错了什么.

All I need is to view a UIView controller in same storyboard file manually with code. I use storyboard to make all forms and connections. My application starts in navigation controller, which provides me access to UIView (LoginViewController) and then it goes to tab bar controller, which provides 4 UIViews. According to every UIView I have .h and .m files. I know about segue method, it is simple, but I need manual method. Maybe I am doing something wrong.

我试图在 IBAction 中使用这种方法推送视图控制器:

I was trying to use this method for pushing view controller in IBAction:

[self.view pushViewController:LoginViewController animated:YES];

但它会出错:

意外的接口名称LoginViewController":预期的表达式

Unexpected interface name ‘LoginViewController’: expected expression

我花了很长时间才弄清楚出了什么问题，但我没有成功.这是我的 RollEnemyController.m 文件:

It took a lot of time to figure out what is wrong, but I had not succeed. Here is my RollEnemyController.m file:

//  RollEnemyController.m
#import "RollEnemyController.h"
#import "LoginViewController.h"
@implementation RollEnemyController;
@synthesize AttackButtonPressed;

- (IBAction)AttackButtonPressed:(id)sender {
    LoginViewController* controller = [[LoginViewController alloc] initWithNibName:@"LoginViewController"  bundle:nil];
    [self.view pushViewController:controller];
}

@end

这是头文件:

//  RollEnemyController.h

#import <UIKit/UIKit.h>

@interface RollEnemyController : UIViewController

- (IBAction)RollButtonPressed:(id)sender;
@property (weak, nonatomic) IBOutlet UIButton *AttackButtonPressed;

@end

推荐答案

我猜你正在使用 UINavigationController.然后你可以简单地这样做:

I'm guessing that you are using a UINavigationController. Then you can simply do like this:

LoginViewController *controller = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];

更新:

如果您使用的是 UIStoryboard，您可以设置新视图控制器的标识符，然后将其推送到您的导航控制器上.要设置标识符，请选择您的视图，打开 Attributes Inspector，然后设置标识符(在我的示例中为LoginIdentifier").然后你可以这样做:

If you are using a UIStoryboard, you can set the identifier of your new viewcontroller, and then push it onto your navigationController. To set the identifier, choose your view, open the Attributes Inspector, and set the identifier ("LoginIdentifier" in my example). Then you can do this:

LoginViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"LoginIdentifier"];
[self.navigationController pushViewController:controller animated:YES];

作为旁注，我看到您在方法中使用了大写字符.您可能应该尽量避免这种情况，而是在方法名称中使用降低的首字符.既然你说你正在学习 Objective-C，你应该在这里查看这个很棒的线程:链接.

As a sidenote, I see that you are using capital characters for your methods. You should probably try to avoid that, and instead use lowered first-characters in your method names. And since you say you are learning Objective-C, you should check out this awesome thread here on SO: link.

更新 2:

这里是一个 zip 文件，其中包含一个项目，展示了如何执行此操作.:-)

Here is a zip file with a project showing how to do this. :-)

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