强制横屏

最新推荐文章于 2021-09-29 09:23:25 发布

iOS大叔

最新推荐文章于 2021-09-29 09:23:25 发布

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本文将介绍如何在iOS应用中通过编程方式实现强制应用保持横屏或竖屏显示，包括设置屏幕方向的代码实现及应用场景。

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- (void)viewWillAppear:(BOOL)animated{
    //强制横屏
    if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
        SEL selector = NSSelectorFromString(@"setOrientation:");
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
        [invocation setSelector:selector];
        [invocation setTarget:[UIDevice currentDevice]];
        int val = UIInterfaceOrientationLandscapeRight;
        [invocation setArgument:&val atIndex:2];
        [invocation invoke];
    }
}

- (void)viewWillDisappear:(BOOL)animated{
    //强制竖屏
    if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
        SEL selector = NSSelectorFromString(@"setOrientation:");
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
        [invocation setSelector:selector];
        [invocation setTarget:[UIDevice currentDevice]];
        int val = UIInterfaceOrientationPortrait;
        [invocation setArgument:&val atIndex:2];
        [invocation invoke];
    }
}