Ios 如何将 ImageView 放置在 UIView 的中心

发布于02月26日

如何将ImageView放置在UIView的中心？

let dailyUIView = UIView(frame: CGRect(x: 0, y: 420, width: view.frame.size.width, height: 40))
dailyUIView.layer.masksToBounds = true
dailyUIView.backgroundColor = UIColor(named: "dailyTest")
scrollView.addSubview(dailyUIView)

let weatherIconImageView = UIImageView(frame: CGRect(x: 70, y: 0, width: 60, height: 60))
weatherIconImageView.image = UIImage(named: "01d")
dailyUIView.addSubview(weatherIconImageView)

推荐答案

   let dailyUIView = UIView(frame: CGRect(x: 0, y: 420, width: view.frame.size.width, height: 40))
   dailyUIView.layer.masksToBounds = true
   dailyUIView.backgroundColor = UIColor(named: "dailyTest")
   scrollView.addSubview(dailyUIView)

   let weatherIconImageView = UIImageView(frame: CGRect(x: 70, y: 0, width: 60, height: 60))
   weatherIconImageView.image = UIImage(named: "01d")
   dailyUIView.addSubview(weatherIconImageView)
        
   weatherIconImageView.translatesAutoresizingMaskIntoConstraints = false         
   NSLayoutConstraint.activate([
            weatherIconImageView.widthAnchor.constraint(equalToConstant: 60),
            weatherIconImageView.heightAnchor.constraint(equalToConstant: 60),
            weatherIconImageView.centerXAnchor.constraint(equalTo: dailyUIView.centerXAnchor),
            weatherIconImageView.centerYAnchor.constraint(equalTo: dailyUIView.centerYAnchor),
        ])