swift UIAlertController UIAlertAction設置 font,color

 

            let alert = UIAlertController(title: "", message: "", preferredStyle: UIAlertController.Style.alert)
            
            ///標題顏色/字體
            let titleAtt = NSMutableAttributedString(string: "刪除會員卡", attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 16, weight: UIFont.Weight.regular),
                NSAttributedString.Key.foregroundColor:UIColor.init(hexString: "#000000")])
            alert.setValue(titleAtt, forKey: "attributedTitle")
　　　　　　

　　　　　　///設置字體alignment 方法1 有問題， 漢字和字母混合系統自動換行

　　　　　　　　let paragraph = NSMutableParagraphStyle()
　　　　　　　　paragraph.alignment = .left
　　　　　　　　alertControllerMessageStr.setAttributes([
　　　　　　　　NSAttributedString.Key.paragraphStyle: paragraph
　　　　　　　　], range: NSRange(location: 0, length: alertControllerMessageStr.length))
　　　　　　　　alert.setValue(alertControllerMessageStr, forKey: "attributedMessage")

　　　　　　//設置字體2 
　　　　　　

            let subView1 = alert.view.subviews[0]

            let subView2 = subView1?.subviews[0]

            let subView3 = subView2?.subviews[0]

            let subView4 = subView3?.subviews[0]

            let subView5 = subView4?.subviews[0]

            var title_lb: UILabel?

            var message_lb: UILabel?

 

            ///subView5.subviews[2] 是label ，就是真機的

            if subView5?.subviews[2].classForCoder == UILabel.classForCoder {

                ///真機subView5.subviews.count 是5

                title_lb = subView5?.subviews[1] as? UILabel ///title

                message_lb = subView5?.subviews[2] as? UILabel ///message

            } else {

                //模擬器 subView5.subviews.count 是4

                title_lb = subView5?.subviews[0] as? UILabel ///title

                message_lb = subView5?.subviews[1] as? UILabel ///message

            }

            title_lb?.textAlignment = .right

            message_lb?.textAlignment = textAlignment

 

            

            //message 字體/顏色
            let messageStr = "\n" + tipTuple.tipStr
            let messageAtt = NSMutableAttributedString(string: messageStr, attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 14, weight: UIFont.Weight.regular), NSAttributedString.Key.foregroundColor:UIColor.init(hexString: "#9B9B9B")])
            alert.setValue(messageAtt, forKey: "attributedMessage")
            
            ///action 顏色
            let leftAction = UIAlertAction(title: "我知道了", style: UIAlertAction.Style.default, handler: nil)
            leftAction.setValue(main_tinColor, forKey: "titleTextColor")
            
            alert.addAction(leftAction)
            self.present(alert, animated: true, completion: nil)

 

 

參考鏈接

https://blog.csdn.net/jacob_ios/article/details/52767411?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param