iOS之修复手机横屏启动界面错乱

原创于 2018-05-14 09:47:39 发布 · 1.3k 阅读

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#iOS #横竖屏 #错乱

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本文介绍了一种在iOS应用中恢复状态栏方向为竖屏的方法。通过使用Objective-C编程语言，利用运行时特性，调用UIApplication的setStatusBarOrientation方法实现状态栏方向的设置。

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- (void)restoreStatusBarOrientation {
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(setStatusBarOrientation:)]) {
        SEL selector = NSSelectorFromString(@"setStatusBarOrientation:");
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIApplication instanceMethodSignatureForSelector:selector]];
        UIDeviceOrientation orentation = UIDeviceOrientationPortrait;
        [invocation setSelector:selector];
        [invocation setTarget:[UIApplication sharedApplication]];
        [invocation setArgument:&orentation atIndex:2];
        [invocation invoke];
    }
}