I am beginner IOS developer and often see in design patterns that people use Heart Beat or Waves
as the progression bar (i.e. song progress). Sometimes these progress bars go around the
Album Art etc.
How can i achieve such thing? I am aware of UISlider
combined with AVAudioPlayer
but couldn't find anything to achieve such as following for song slider.
You could make a custom View, and draw the vertical lines manually. The main procedure for reference:
import UIKit
class WavedProgressView: UIView {
var lineMargin:CGFloat = 2.0
var volumes:[CGFloat] = [0.5,0.3,0.2,0.6,0.4,0.5,0.8,0.6,0.4]
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.darkGray
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.backgroundColor = UIColor.darkGray
}
override var frame: CGRect {
didSet{
self.drawVerticalLines()
}
}
var lineWidth:CGFloat = 3.0{
didSet{
self.drawVerticalLines()
}
}
func drawVerticalLines() {
let linePath = CGMutablePath()
for i in 0..<self.volumes.count {
let height = self.frame.height * volumes[i]
let y = (self.frame.height - height) / 2.0
linePath.addRect(CGRect(x: lineMargin + (lineMargin + lineWidth) * CGFloat(i), y: y, width: lineWidth, height: height))
}
let lineLayer = CAShapeLayer()
lineLayer.path = linePath
lineLayer.lineWidth = 0.5
lineLayer.strokeColor = UIColor.white.cgColor
lineLayer.fillColor = UIColor.white.cgColor
self.layer.sublayers?.removeAll()
self.layer.addSublayer(lineLayer)
}
}
And please make it more perfect by yourself, like: handling event, applying default and highlighted color etc.