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1. 通过CocoaPods安装SnapKit

platform :ios, '10.0'

target '<Your Target Name>' do

use_frameworks!

pod 'SnapKit', '~> 4.0.0'

end

2. 自定义UI组件

import UIKit
import SnapKit

class CustomView: UIView {

var isFirstLayout: Bool = true

lazy var firstView: UIView = {
let firstView: UIView = UIView()
return firstView
}()

lazy var secondView: UIView = {
let secondView: UIView = UIView()
return secondView
}()

override init(frame: CGRect) {
super.init(frame: frame)
self.commonInit()
}

required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.commonInit()
}

func commonInit() {
self.addSubview(self.firstView)
self.addSubview(self.secondView)
}

override func layoutSubviews() {
super.layoutSubviews()

if self.isFirstLayout {
self.firstView.snp.makeConstraints { (make) -> Void in

}

self.secondView.snp.makeConstraints { (make) -> Void in

}

self.isFirstLayout = false
}
}
}

转载于:https://www.cnblogs.com/metaphors/p/9405371.html

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