按鈕底部編程

Question

我想使用這個庫：

https://github.com/yannickl/DynamicButton#requirements

，我需要把底部編程（SWIFT）在我的ViewController的底部與底部之間有點距離的和按鈕。我怎麼能這樣做？

非常感謝！

Answer 1

使用自動佈局

self.view.addSubview(button) 

button.translatesAutoresizingMaskIntoConstraints = false 

button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true 
button.widthAnchor.constraint(equalToConstant: 50).isActive = true 
button.heightAnchor.constraint(equalToConstant: 50).isActive = true 
button.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: -20).isActive = true 

Answer 2

let bottomOffset = 20 

let yourButton = UIButton(frame: CGRect(X:0, y:0, width:50, height:50)) 
yourButton.backgroundColor = UIColor.red 
yourButton.frame.origin = CGPoint(X:0, y:self.view.framse.size.height - yourButton.frame.size.height - bottomOffset) 

self.view.addsubview(yourButton)