Swift - How to set custom view by text length - ios

Question

Here is my code,
func bannerNotification(text: String){
let container = UIView()
let image = UIImageView()
let label = UILabel()
container.frame = CGRect(x: 0, y:0, width: self.view.frame.size.width, height: 100)
container.backgroundColor = .blue
image.frame = CGRect(x: 15, y: 50, width: 30, height: 30)
image.image = UIImage(named: "passport")
label.frame = CGRect(x: image.bounds.maxX + 35, y: 50, width: container.frame.size.width - 100, height: 50)
label.backgroundColor = .red
label.numberOfLines = 0
label.font = UIFont(name:"Helvetica Neue", size: 15)
label.text = text
container.addSubview(image)
container.addSubview(label)
self.view.addSubview(container)
}
According to this code the container and Image is coming on right position but if I pass small text so my text is not inline with Image, means my image top position and text top position should be same.
If I will pass a big text so container bottom and Label bottom should be same and all text should be there not truncated and Image and Label should be inline from the top.

Answer 1

You really want to use auto-layout for this, particularly since you're using multi-line label -- meaning, it will vary in height.
Here's an example - read through the comments to understand the auto-layout constraints:
class KingViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
bannerNotification(text: "Banner Test")
//bannerNotification(text: "Banner Test with lots of text to wrap onto multiple lines. Of the many advantages with using auto-layout, notice that the banner will stretch when you rotate the device.")
}
func bannerNotification(text: String){
let container = UIView()
let image = UIImageView()
let label = UILabel()
container.addSubview(image)
container.addSubview(label)
self.view.addSubview(container)
[image, label, container].forEach {
$0.translatesAutoresizingMaskIntoConstraints = false
}
container.backgroundColor = UIColor(red: 0.0, green: 0.5, blue: 1.0, alpha: 1.0)
//image.image = UIImage(named: "passport")
image.image = UIImage(named: "swiftRed")
label.backgroundColor = .yellow
label.numberOfLines = 0
label.font = UIFont(name:"Helvetica Neue", size: 15)
label.text = text
// respect the safe area
let g = view.safeAreaLayoutGuide
NSLayoutConstraint.activate([
// constrain container Top / Leading / Trailing
container.topAnchor.constraint(equalTo: view.topAnchor),
container.leadingAnchor.constraint(equalTo: view.leadingAnchor),
container.trailingAnchor.constraint(equalTo: view.trailingAnchor),
// we'll use the label height to determine the container height
// image view Top = 8 / Leading = 15
image.topAnchor.constraint(equalTo: g.topAnchor, constant: 8.0),
image.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 15.0),
// image view width = 30 / height == width (1:1 ratio)
image.widthAnchor.constraint(equalToConstant: 30.0),
image.heightAnchor.constraint(equalTo: image.widthAnchor),
// label Top aligned to Top of image view
label.topAnchor.constraint(equalTo: image.topAnchor),
// label Leading == image view Trailing + 20
label.leadingAnchor.constraint(equalTo: image.trailingAnchor, constant: 20.0),
// label Trailing = container Trailing - 15
label.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -15.0),
// container bottom should be
// At Least 8-pts below the image view bottom
// AND
// At Least 8-pts below the label bottom
container.bottomAnchor.constraint(greaterThanOrEqualTo: image.bottomAnchor, constant: 8.0),
container.bottomAnchor.constraint(greaterThanOrEqualTo: label.bottomAnchor, constant: 8.0),
])
}
}
Result, with short text:
Result with long text:
Note that it auto-adjusts when the size changes - such as with device rotation: