iOS开发之强制横竖屏

步骤和代码

• 第一步 ：Appdelegate文件中设置

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

//在AppDelegate.h文件中设置两个属性
@property(nonatomic, assign) BOOL isForcePortrait;
@property(nonatomic, assign) BOOL isForceLandscape;

@end

//在AppDelegate.m文件中实现代理方法
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    if (self.isForceLandscape) {
        return UIInterfaceOrientationMaskLandscape;
    }else if (self.isForcePortrait){
        return UIInterfaceOrientationMaskPortrait;
    }else{
        return UIInterfaceOrientationMaskAll;
    }
}

• 第二步：设置横竖屏的方法，写在分类中

//UIDevice+TFDevice.h文件
#import <UIKit/UIKit.h>

@interface UIDevice (TFDevice)
//interfaceOrientation 输入要强制转屏的方向
+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation;
@end

//UIDevice+TFDevice.m文件
#import "UIDevice+TFDevice.h"

@implementation UIDevice (TFDevice)

+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];
    [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];
    NSNumber *orientationTarget = [NSNumber numberWithInt:interfaceOrientation];
    [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
}
@end

• 第三步：设置横竖屏

#pragma  mark - 强制横竖屏设置
- (void)forceOrientationLandscape { //强制横屏
    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    appDelegate.isForcePortrait = NO;
    appDelegate.isForceLandscape = YES;
    [UIDevice switchNewOrientation:UIInterfaceOrientationLandscapeRight];
}
- (void)forceOrientationPortrait  { //强制竖屏
    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    appDelegate.isForcePortrait = YES;
    appDelegate.isForceLandscape = NO;
    [UIDevice switchNewOrientation:UIInterfaceOrientationPortrait];
}

注意

• 这个在展示控制器的时候需要调用，在dismiss或者pop掉控制器的时候也需要将设置恢复原样。

• 在第三步上强制横屏的以下这句代码中，后面的旋转方向仅仅是告诉屏幕要往横屏右方向转，至于转完之后屏幕能不能也能横屏左那就要看Appdelegate里面实现的代理方法怎么实现的了...

 [UIDevice switchNewOrientation:UIInterfaceOrientationLandscapeRight];

DEMO传送门

参考

iOS强制横屏或强制竖屏

以上！！！

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