iOS 指定页面允许旋转/ 指定页面强制横屏

最新推荐文章于 2021-09-10 15:52:06 发布

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最新推荐文章于 2021-09-10 15:52:06 发布

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本文链接：https://blog.youkuaiyun.com/flg1554112450/article/details/77981610

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本文介绍了如何在iOS应用中实现指定页面仅支持横屏、支持横竖屏以及强制单向横屏的功能。通过在APPdelegate中设置不同值，配合BaseViewController及各页面的viewWillAppear方法，调整屏幕方向。

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在APPdelegate.h 中

@property (assign , nonatomic) NSInteger isForcePortrait;

APPdelegate.m 中

self.isForcePortrait == 1 《只支持横屏》

self.isForcePortrait == 2 《支持左右横屏和竖屏》

self.isForcePortrait == 3 《只支持一个方向的横屏》

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{

if (self.isForcePortrait == 1){

return UIInterfaceOrientationMaskPortrait;

}else if(self.isForcePortrait == 2){

return UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscapeLeft|UIInterfaceOrientationMaskPortrait;

}else if (self.isForcePortrait == 3){

return UIInterfaceOrientationMaskLandscapeRight;

}else{

return UIInterfaceOrientationMaskPortrait;

}

情况1：只支持横屏的controller. 所有只支持竖屏的controller继承于基类baseviewcontroller，，

BaseViewController.m中

- (void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];

AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;

appdelegate.isForcePortrait=1;

[appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];

}

情况2：支持竖屏，左右横屏，，.支持竖屏，左右横屏的controller.m中

- (void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];

AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;

appdelegate.isForcePortrait=2;

[appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];

}

情况3：只支持横屏controller 进来就横屏且只能横屏在controller.m中

- (void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];

AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;

appdelegate.isForcePortrait=3;

[appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];

屏幕开始发生旋转

[self orientationToPortrait:UIInterfaceOrientationLandscapeRight];

}

/// 屏幕发生旋转的方法==============

- (void)orientationToPortrait:(UIInterfaceOrientation)orientation {

SEL selector = NSSelectorFromString(@"setOrientation:");

NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];

[invocation setSelector:selector];

[invocation setTarget:[UIDevice currentDevice]];

int val = orientation;

[invocation setArgument:&val atIndex:2];//前两个参数已被target和selector占用

[invocation invoke];

}

记得页面消失的时候把屏幕旋转为竖屏返回方法或屏幕消失方法中

AppDelegate *appdelegate=(AppDelegate *)[UIApplication sharedApplication].delegate;

appdelegate.isForcePortrait=1;

[appdelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];

[weakself orientationToPortrait:UIInterfaceOrientationPortrait];