iOS swift使用xib繪製UIView

iOS swift使用xib繪製UIView

目標：用xib繪製一個UIView，在某個ViewController中調用。

三個檔案：ViewController.swift DemoView.swift DemoView.xib

 

首先，可以專心將DemoView.xib畫出來，別忘記DemoView.xib中UIView的一處設定

 

然後，寫DemoView.swift檔案，代碼如下：

 

class CoreView: UIView {    //MARK:    //MARK: properties       @IBOutlet weak var makefriendsBtn: UIButton!    @IBOutlet weak var networkBtn: UIButton!    @IBOutlet weak var everyoneBtn: UIButton!     //MARK:    //MARK: constraints        @IBOutlet weak var makefriendsBtnWidth: NSLayoutConstraint!    @IBOutlet weak var networkBtnWidth: NSLayoutConstraint!    @IBOutlet weak var everyoneBtnWidth: NSLayoutConstraint!            //MARK:    //MARK: functions        required init(coder aDecoder: NSCoder) {        super.init(coder: aDecoder)            }            // Only override drawRect: if you perform custom drawing.    // An empty implementation adversely affects performance during animation.    override func drawRect(rect: CGRect) {        makeupUI()    }           func makeupUI() {        self.layer.masksToBounds = true        self.layer.cornerRadius = 3                makefriendsBtn.layer.borderWidth = 1        makefriendsBtn.layer.cornerRadius = 3        makefriendsBtn.layer.borderColor = UIColor(red: 107/256, green: 167/256, blue: 249/256, alpha: 1).CGColor        makefriendsBtn.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Selected)        makefriendsBtn.addTarget(self, action: buttonSelected:, forControlEvents: UIControlEvents.TouchUpInside)                networkBtn.layer.borderWidth = 1        networkBtn.layer.cornerRadius = 3        networkBtn.layer.borderColor = UIColor(red: 107/256, green: 167/256, blue: 249/256, alpha: 1).CGColor        networkBtn.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Selected)        networkBtn.addTarget(self, action: buttonSelected:, forControlEvents: UIControlEvents.TouchUpInside)                everyoneBtn.layer.borderWidth = 1        everyoneBtn.layer.cornerRadius = 0        everyoneBtn.layer.borderColor = UIColor(red: 107/256, green: 167/256, blue: 249/256, alpha: 1).CGColor        everyoneBtn.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Selected)        everyoneBtn.addTarget(self, action: buttonSelected:, forControlEvents: UIControlEvents.TouchUpInside)                        makefriendsBtnWidth.constant = (self.frame.width - 32 - 29) / 3 + 10        networkBtnWidth.constant = (self.frame.width - 32 - 29) / 3 + 2        everyoneBtnWidth.constant = (self.frame.width - 32 - 29) / 3 - 2                    }            func buttonSelected(button: UIButton) {                button.selected = !button.selected                if button.selected == true {            button.backgroundColor = UIColor(red: 107/256, green: 167/256, blue: 249/256, alpha: 1)        } else {            button.backgroundColor = UIColor.whiteColor()        }    }        }

 

 

下面就可以在ViewController.swift中調用了：

 

var myView = NSBundle.mainBundle().loadNibNamed(DemoView, owner: nil, options: nil).first as? DemoView                myView?.frame = CGRect(x: 0, y: 0, width: self.view.frame.width-50, height: self.view.frame.height-140)        myView?.center = self.view.center                if myView != nil {            self.view.addSubview(myView!)        }

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