如何改变UIAlertController的色调？

Question

我可以改变颜色UIAlertController吗？标准颜色是蓝色.它与标准的iOS应用程序非常接近.如果它是可定制的？我怎样才能改变这个颜色？例如按钮颜色.

谢谢!

Answer 1

您可以更改tintColor底层视图,但是,由于iOS 9中引入的已知错误(https://openradar.appspot.com/22209332),tintColor被应用程序窗口覆盖tintColor.

你可以:

1. tintColor在AppDelegate中更改应用程序.

   func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {
       self.window.tintColor = UIColor.redColor()
       return true
   }
   

2. 重新应用完成块中的颜色.

   self.presentViewController(alert, animated: true, completion: {() -> Void in
       alert.view.tintColor = UIColor.redColor()
   })
   

Answer 2

在Swift中,你可以这样做:

let alert = UIAlertController(title: "Alert", message: "This is an alert.", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
alert.view.tintColor = UIColor.redColor()
self.presentViewController(alert, animated: true, completion: nil)

Answer 3

在Swift 4和Xcode 9.2中

let alertView = UIAlertController(title: "", message: "", preferredStyle: .alert)

alertView.addAction(UIAlertAction(title: "CONFIRM", style: .default, handler: { (alertAction) -> Void in
                //my logic
            }))

alertView.addAction(UIAlertAction(title: "CANCEL", style: .default, handler: nil))


alertView.view.tintColor = UIColor.init(red: 45.0/255.0, green: 187.0/255.0, blue: 135.0/255.0, alpha: 1.0)

present(alertView, animated: true, completion: nil)