forked from zelo72/mastodon-ios
87 lines
2.5 KiB
Swift
87 lines
2.5 KiB
Swift
//
|
|
// PrimaryActionButton.swift
|
|
// Mastodon
|
|
//
|
|
// Created by BradGao on 2021/2/20.
|
|
//
|
|
|
|
import UIKit
|
|
|
|
class PrimaryActionButton: UIButton {
|
|
|
|
var isLoading: Bool = false
|
|
|
|
lazy var activityIndicator: UIActivityIndicatorView = {
|
|
let indicator = UIActivityIndicatorView(style: .medium)
|
|
indicator.color = .white
|
|
indicator.hidesWhenStopped = true
|
|
indicator.translatesAutoresizingMaskIntoConstraints = false
|
|
return indicator
|
|
}()
|
|
|
|
private var originalButtonTitle: String?
|
|
|
|
var adjustsBackgroundImageWhenUserInterfaceStyleChanges = true
|
|
|
|
override init(frame: CGRect) {
|
|
super.init(frame: frame)
|
|
_init()
|
|
}
|
|
|
|
required init?(coder: NSCoder) {
|
|
super.init(coder: coder)
|
|
_init()
|
|
}
|
|
|
|
}
|
|
|
|
extension PrimaryActionButton {
|
|
|
|
private func _init() {
|
|
titleLabel?.font = UIFontMetrics(forTextStyle: .headline).scaledFont(for: .systemFont(ofSize: 17, weight: .semibold))
|
|
setTitleColor(.white, for: .normal)
|
|
setupBackgroundAppearance()
|
|
applyCornerRadius(radius: 10)
|
|
}
|
|
|
|
func setupBackgroundAppearance() {
|
|
setBackgroundImage(UIImage.placeholder(color: Asset.Colors.brandBlue.color), for: .normal)
|
|
setBackgroundImage(UIImage.placeholder(color: Asset.Colors.brandBlueDarken20.color), for: .highlighted)
|
|
setBackgroundImage(UIImage.placeholder(color: Asset.Colors.disabled.color), for: .disabled)
|
|
}
|
|
|
|
override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
|
|
super.traitCollectionDidChange(previousTraitCollection)
|
|
|
|
if adjustsBackgroundImageWhenUserInterfaceStyleChanges {
|
|
setupBackgroundAppearance()
|
|
}
|
|
}
|
|
|
|
func showLoading() {
|
|
guard !isLoading else { return }
|
|
isEnabled = false
|
|
isLoading = true
|
|
originalButtonTitle = title(for: .disabled)
|
|
self.setTitle("", for: .disabled)
|
|
|
|
addSubview(activityIndicator)
|
|
NSLayoutConstraint.activate([
|
|
activityIndicator.centerXAnchor.constraint(equalTo: self.centerXAnchor),
|
|
activityIndicator.centerYAnchor.constraint(equalTo: self.centerYAnchor),
|
|
])
|
|
activityIndicator.startAnimating()
|
|
}
|
|
|
|
func stopLoading() {
|
|
guard isLoading else { return }
|
|
isLoading = false
|
|
if activityIndicator.superview == self {
|
|
activityIndicator.removeFromSuperview()
|
|
}
|
|
isEnabled = true
|
|
self.setTitle(originalButtonTitle, for: .disabled)
|
|
}
|
|
|
|
}
|