Question

我正在尝试在Xcode中创建一个应用程序，当手机从一个方向旋转到另一个方向时，该应用程序将切换到新视图。

这是“switchviewcontroller.h”文件代码：

#import <UIKit/UIKit.h>

@interface SwitchViewController : UIViewController {

}

-(IBAction)switchview:(id)sender;

@end

这是“switchviewcontroller.m”文件代码：

#import "SwitchViewController.h"
#import "secondview.h"

@implementation SwitchViewController

-(IBAction)switchview:(id)sender {}

// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return YES;
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    if((fromInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) ||
       (fromInterfaceOrientation == UIInterfaceOrientationLandscapeRight))
    {    
        [[secondview alloc] initWithNibName:@"secondview" bundle:[NSBundle mainBundle]];
    }

}

它在iPhone模拟器中运行没有错误，但是，当我旋转它时不会加载新视图。对于初学者我认为我需要应用程序以横向模式打开，我不知道该怎么做，但它仍然无法工作，我认为它与代码的“initWithNibName”部分有关。我有.xib文件而不是.nib文件。任何人都可以帮我这两件事吗？感谢。

Answer 1

你没有推动或展示任何东西，你只是在开始观察。

secondview *second = [[secondview alloc] initWithNibName:@"secondview" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:second animated:YES];

然而，它并不是展示新视角的好地方。

如果您想以不同的方向显示相同的视图，请尝试以下操作：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    if(((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) || 
        (interfaceOrientation == UIInterfaceOrientationLandscapeRight))){

        self.view = landscape;

    }else if(((interfaceOrientation == UIInterfaceOrientationPortrait) || 
              (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown))){

        self.view = portrait;

    }

    return YES;
}

请注意，portrait和landscape是UIViewController中的UIView，您可以在标头中定义并通过Interface Builder进行连接。

另外，这些需要在 .h / .m ：

·H

IBOutlet UIView *portrait;
IBOutlet UIView *landscape;

@property(nonatomic,retain) UIView portrait;
@property(nonatomic,retain) UIView landscape;

的.m

@synthesize portrait,landscape;

Answer 2

您必须分配并初始化一个新视图，并用新视图替换当前的viewcontroller视图。

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
    if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation) {
        UIView *landscapeView = [[UIView alloc] init];
        // Setup the landscape view here
        self.view = landscapeView;
        [landscapeView release];
    }
    else {
         UIView *portraitView = [[UIView alloc] init];
        // Setup the portrait view here
        self.view = portraitView;
        [portraitView release];
    }
}

尝试加载方向更改的新视图

2 个答案:

·H

的.m