iOS界面点击按钮切换横屏竖屏

最新推荐文章于 2021-02-20 17:01:32 发布

原创最新推荐文章于 2021-02-20 17:01:32 发布 · 3.1k 阅读

0 ·

CC 4.0 BY-SA版权

IOS 适配专栏收录该内容

21 篇文章

订阅专栏

本文详细介绍了一种在iOS应用中实现从竖屏到横屏界面转换的方法。通过在AppDelegate中添加特定属性和方法，以及在ViewController中使用按钮触发屏幕方向的改变，实现了设备屏幕方向的自由切换。代码示例展示了如何在Xcode中配置应用，以及如何在ViewController中通过按钮点击事件来强制改变设备的屏幕方向。

首先，看效果图：

在这里因为是要全局界面都是支持竖屏，其他的不支持，在Xcode里面的配置

然后就是在AppDelegate中添加属性和方法

这个是viewController中，即需要转换屏幕方向的.m文件的代码：

#import "ViewController.h"
#import "AppDelegate.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
//     _currentOrient = [UIApplication  sharedApplication].statusBarOrientation;
    
    UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setTitle:@"转一转" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(changeFrame:) forControlEvents:UIControlEventTouchUpInside];
    button.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:button];
    
   NSLayoutConstraint * centerX = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:0];
   NSLayoutConstraint * centerY = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterY multiplier:1.0 constant:0];
   NSLayoutConstraint * width = [NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:100];
   NSLayoutConstraint * height =[NSLayoutConstraint constraintWithItem:button attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:44];
    
    [NSLayoutConstraint activateConstraints:@[centerX,centerY,width,height]];
    centerY.active = YES;
    centerX.active = YES;
    width.active = YES;
    height.active = YES;
    
}
// 允许自动旋转
-(BOOL)shouldAutorotate{
    return YES;
}
// 横屏时是否将状态栏隐藏
-(BOOL)prefersStatusBarHidden{
    return NO;
}
-(void)changeFrame:(UIButton *)btn{
    
    btn.selected = !btn.selected;
    
    if (btn.selected) {
        [self forceOrientationLandscapeWith:self];
    }else{
        [self forceOrientationPortraitWith:self];
    }
}
// 横屏 home键在右边
-(void)forceOrientationLandscapeWith:(UIViewController *)VC{
    
    AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;
    appdelegate.isForcePortrait=NO;
    appdelegate.isForceLandscape=YES;
    [appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:VC.view.window];
    
    //强制翻转屏幕，Home键在右边。
    [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeRight) forKey:@"orientation"];
    //刷新
    [UIViewController attemptRotationToDeviceOrientation];
}
// 竖屏
- (void)forceOrientationPortraitWith:(UIViewController *)VC{
    
    AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;
    appdelegate.isForcePortrait=YES;
    appdelegate.isForceLandscape=NO;
    [appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:VC.view.window];
    
    //强制翻转屏幕
    [[UIDevice currentDevice] setValue:@(UIDeviceOrientationPortrait) forKey:@"orientation"];
    //刷新
    [UIViewController attemptRotationToDeviceOrientation];
}