Swift自定義View和OC自定義View的原理都是一樣的，重寫init()方法或initWithFrame()方法，下面簡單說說如何自定義swift UIView
主要是重寫init（frame：CGRect)方法，其中required init?(coder aDecoder: NSCoder) 是必不可少的，swift語言強制要求的
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//// LoginImgFieldView.swift// SmartMilk//// Created by mac on 2017/6/9.// Copyright © 2017年 mac. All rights reserved.//import UIKit let G_HEADIMAGE_HEIGHT:CGFloat = 30 class LoginImgFieldView: UIView { var headImgView:UIImageView? var field:UITextField? var line:UILabel? /* // Only override draw() if you perform custom drawing. // An empty implementation adversely affects performance during animation. override func draw(_ rect: CGRect) { // Drawing code } */// override init(){// super.init()// setupSubViews()// } override init(frame:CGRect){ super.init(frame: frame) setupSubViews() } required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") } func setupSubViews() { let frame = self.bounds //uiimageVIew headImgView = UIImageView(frame:CGRect(x:0,y:0,width:G_HEADIMAGE_HEIGHT,height:G_HEADIMAGE_HEIGHT)) headImgView?.backgroundColor = UIColor.blue //uiTextField field = UITextField(frame:CGRect(x:0,y:0,width:100,height:G_HEADIMAGE_HEIGHT))// field?.font = UIFont.systemFont(ofSize: 15) //uiLabel line = UILabel(frame: CGRect(x:0,y:frame.size.height-1,width:frame.size.width,height:1)) line?.backgroundColor = UIColor.orange self.addSubview(headImgView!) self.addSubview(field!) self.addSubview(line!) } override func layoutSubviews() { super.layoutSubviews() let frame = self.bounds let imgY = (frame.size.height - G_HEADIMAGE_HEIGHT)/2 headImgView?.frame = CGRect(x:0,y:imgY,width:G_HEADIMAGE_HEIGHT,height:G_HEADIMAGE_HEIGHT) //field let fieldx = G_HEADIMAGE_HEIGHT+5 let fieldWidth = frame.size.width - fieldx field?.frame = CGRect(x: fieldx, y: imgY, width: fieldWidth, height: G_HEADIMAGE_HEIGHT) //label var lineFrame = line?.frame lineFrame?.origin.y = frame.size.height - 2 lineFrame?.size.width = frame.size.width line?.frame = lineFrame! } } |
到此這篇關于Swift代碼自定義UIView實現示例的文章就介紹到這了,更多相關Swift自定義UIView內容請搜索服務器之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持服務器之家！
原文鏈接：https://blog.csdn.net/moqj_123/article/details/73351098
