如何在iOS5中获得默认的LandscapeLeft方向？

Question

很抱歉，如果这个问题重复，但我找不到相同的解决方案。 在iOS6中，如果我想为一个UIViewController设置默认方向，我只需使用：

- (BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskLandscapeLeft;
}

但是如何在iOS5中做同样的事情，我测试了两个：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft);//not default
}
and
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return (toInterfaceOrientation == UIInterfaceOrientationMaskLandscapeLeft);// = return NO;
}

但是默认方向总是Portrait.Any建议？

Answer 1

调用以下方法，您要检查orientation.happy编码的状态： - ）

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [self CheckForViewForOrientation:toInterfaceOrientation];
}

- (void) CheckForViewForOrientation:(UIInterfaceOrientation)orientation
{
    if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown)
    {
        //Ur lable portrait view
    }
    else if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
    {
        //Ur lable for landscape view
    }
}

Answer 2

如果要在整个应用程序中实现此目的，请在app.plist文件中更改支持的方向UISupportedInterfaceOrientations

Answer 3

- (BOOL)shouldAutorotate {

UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];

if (orientation==UIInterfaceOrientationPortrait) {
 // do some 

}

return YES;
}

包括支持5和6的方法

Answer 4

您需要提供

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
     UIInterfaceOrientationIsLandscape(interfaceOrientation);
}

用于该单个View控制器。