-
Notifications
You must be signed in to change notification settings - Fork 252
/
BoundingBox.swift
56 lines (46 loc) · 1.66 KB
/
BoundingBox.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
import Foundation
import UIKit
class BoundingBox {
let shapeLayer: CAShapeLayer
let textLayer: CATextLayer
init() {
shapeLayer = CAShapeLayer()
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.lineWidth = 4
shapeLayer.isHidden = true
textLayer = CATextLayer()
textLayer.foregroundColor = UIColor.black.cgColor
textLayer.isHidden = true
textLayer.contentsScale = UIScreen.main.scale
textLayer.fontSize = 14
textLayer.font = UIFont(name: "Avenir", size: textLayer.fontSize)
textLayer.alignmentMode = CATextLayerAlignmentMode.center
}
func addToLayer(_ parent: CALayer) {
parent.addSublayer(shapeLayer)
parent.addSublayer(textLayer)
}
func show(frame: CGRect, label: String, color: UIColor) {
CATransaction.setDisableActions(true)
let path = UIBezierPath(rect: frame)
shapeLayer.path = path.cgPath
shapeLayer.strokeColor = color.cgColor
shapeLayer.isHidden = false
textLayer.string = label
textLayer.backgroundColor = color.cgColor
textLayer.isHidden = false
let attributes = [
NSAttributedString.Key.font: textLayer.font as Any
]
let textRect = label.boundingRect(with: CGSize(width: 400, height: 100),
options: .truncatesLastVisibleLine,
attributes: attributes, context: nil)
let textSize = CGSize(width: textRect.width + 12, height: textRect.height)
let textOrigin = CGPoint(x: frame.origin.x - 2, y: frame.origin.y - textSize.height)
textLayer.frame = CGRect(origin: textOrigin, size: textSize)
}
func hide() {
shapeLayer.isHidden = true
textLayer.isHidden = true
}
}