加载SLComposeViewController时,即使我已将Main UIViewController修复为Portrait,它也会旋转到设备方向

时间:2015-03-12 00:31:19

标签: ios iphone swift slcomposeviewcontroller

我正在开发iOS8.1中的通用应用。

我希望该应用始终以纵向方向显示。

我通过添加以下代码强制它。这很有效。

在AppDelegate中:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        // Override point for customization after application launch.

        let value = UIInterfaceOrientation.Portrait.rawValue
        UIDevice.currentDevice().setValue(value, forKey: "orientation")

        return true
    }

我为所有View控件使用以下子类:

class PortraitViewController: UIViewController {

    override func shouldAutorotate() -> Bool {
        return true
    }

    override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
        return UIInterfaceOrientation.Portrait
    }

    override func supportedInterfaceOrientations() -> Int {
        return Int(UIInterfaceOrientationMask.Portrait.rawValue)
    }

}

然后,我在我的应用程序中添加了一个SLComposeViewController,以便用户可以发布到Facebook。如果用户在设备处于横向状态时打开此SLComposeViewController,则SLComposeViewController将接管并旋转屏幕,包括已呈现的所有其他ViewController。

我想强制SLComposeViewController始终保持纵向方向,但无法弄清楚如何让它工作。

任何人都可以帮助我吗?

这是我用来打开SLComposeViewController的代码。

func pressFacebook(){
    if PortraitSLComposeViewController.isAvailableForServiceType(SLServiceTypeFacebook) {
        var facebookSheet: SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)

        facebookSheet.setInitialText("My Status!")
        self.presentViewController(facebookSheet, animated: true, completion: nil)
        facebookSheet.addURL(NSURL(string: "www.blahblah.com"))
        facebookSheet.addImage(UIImage(named: "fb.jpg"))

    }
}

提前致谢!

2 个答案:

答案 0 :(得分:5)

我能够通过继承SLComposeViewController

来解决这个问题
import Social
import UIKit

class ComposeViewController: SLComposeViewController {

    override func shouldAutorotate() -> Bool {
        return true
    }

    override func supportedInterfaceOrientations() -> Int {
        return Int(UIInterfaceOrientationMask.Portrait.rawValue)
    }

}

答案 1 :(得分:2)

您可以子类化SLComposeViewController或只是扩展它。

以下是我如何以一般化的方式解决问题。 UIActivityViewController和它呈现的SLComposeViewController都会检查他们的呈现视图控制器,以使用以下类别扩展来确定其自动旋转配置:

@implementation UIActivityViewController (FixAutoRotation)

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return self.presentingViewController.preferredInterfaceOrientationForPresentation;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return self.presentingViewController.supportedInterfaceOrientations;
}

- (BOOL)shouldAutorotate {
    return false;
}

@end


@implementation SLComposeViewController (FixAutoRotation)

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return self.presentingViewController.preferredInterfaceOrientationForPresentation;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return self.presentingViewController.supportedInterfaceOrientations;
}

- (BOOL)shouldAutorotate {
    return false;
}

@end

此代码位于Objective-C中,但更改为Swift应该是微不足道的。请注意,在假设这些视图控制器总是以模态方式呈现的情况下,您必须强制解包presentViewController。