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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
}
}
}
