ios – 更改UIAlertcontroller背景颜色

概述好吧,我有这个警告,我正在使用它,我希望它的背景是黑色而不是灰色的样子.我设法改变了标题和消息的文本颜色,但没有改变背景颜色.那么我想要的颜色.我已将其更改为绿色蓝色和白色,但不是黑色.当我尝试将其更改为黑色时,它会变为灰色.任何建议都会有所帮助并受到赞赏.我在 How to change the background color of the UIAlertController?尝试了这个,这就 好吧,我有这个警告,我正在使用它,我希望它的背景是黑色而不是灰色的样子.我设法改变了标题和消息的文本颜色,但没有改变背景颜色.那么我想要的颜色.我已将其更改为绿色蓝色和白色,但不是黑色.当我尝试将其更改为黑色时,它会变为灰色.任何建议都会有所帮助并受到赞赏.我在 How to change the background color of the UIAlertController?尝试了这个,这就是我到达现在的位置.

这就是我现在要做的事情：

func showAlert(Title:String,message:String) {    //Set up for the Title color    let attributedString = NSAttributedString(string: Title,attributes: [        NSFontAttributename : UIFont.systemFontOfSize(15),//your Font here,NSForegroundcolorAttributename : UIcolor.whitecolor()        ])    //Set up for the Message color    let attributedString2 = NSAttributedString(string: message,NSForegroundcolorAttributename : UIcolor.whitecolor()        ])    let alert = UIAlertController(Title: Title,message: message,preferredStyle: .Alert)    alert.setValue(attributedString,forKey: "attributedTitle")    alert.setValue(attributedString2,forKey: "attributedMessage")    //alert.vIEw.tintcolor = UIcolor.whitecolor()    let dismissAction = UIAlertAction(Title: "dismiss",style: .Destructive,handler: nil)        alert.addAction(dismissAction)    self.presentVIEwController(alert,animated: true,completion: nil)    //set the color of the Alert    let subvIEw = alert.vIEw.subvIEws.first! as UIVIEw    let alertContentVIEw = subvIEw.subvIEws.first! as UIVIEw    alertContentVIEw.backgroundcolor = UIcolor.blackcolor()    //alertContentVIEw.backgroundcolor = UIcolor.greencolor()    //Changes is to a grey color :(     /*    alertContentVIEw.backgroundcolor = UIcolor(        red: 0,green: 0,blue: 0,Alpha: 1.0)    //Also another Grey color Not batman black    */    //alertContentVIEw.backgroundcolor = UIcolor.bluecolor()    //turns into a purple}

解决方法 试试这个

Swift2及以下

let subvIEw :UIVIEw = alert.vIEw.subvIEws. first! as UIVIEwlet alertContentVIEw = subvIEw.subvIEws. first! as UIVIEwalertContentVIEw.backgroundcolor = UIcolor.blackcolor()

目标-C

UIVIEw *subVIEw = alertController.vIEw.subvIEws.firstObject; //firstObjectUIVIEw *alertContentVIEw = subVIEw.subvIEws.firstObject; //firstObject[alertContentVIEw setBackgroundcolor:[UIcolor darkGraycolor]];alertContentVIEw.layer.cornerRadius = 5;

更新的答案迅速3及以上

let alert = UIAlertController(Title: "valIDate",message: "Check the process",preferredStyle: .alert)    let dismissAction = UIAlertAction(Title: "dismiss",style: .destructive,handler: nil)    alert.addAction(dismissAction)    self.present(alert,completion:  nil)    // change the background color    let subvIEw = (alert.vIEw.subvIEws.first?.subvIEws.first?.subvIEws.first!)! as UIVIEw    subvIEw.layer.cornerRadius = 1    subvIEw.backgroundcolor = UIcolor(red: (195/255.0),green: (68/255.0),blue: (122/255.0),Alpha: 1.0)

产量

苹果手机

iPad的

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