-
Notifications
You must be signed in to change notification settings - Fork 0
/
UIColorExtension.swift
53 lines (40 loc) · 1.41 KB
/
UIColorExtension.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
//
// UIColorExtension.swift
// Copyrobo
//
// Created by Tan Le on 8/14/17.
// Copyright © 2017 HungLe-iMac. All rights reserved.
//
import Foundation
import UIKit
@objc extension UIColor {
convenience init(hexString: String, alpha: Float) {
let hexString:NSString = hexString.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines) as NSString
let scanner = Scanner(string: hexString as String)
if (hexString.hasPrefix("#")) {
scanner.scanLocation = 1
}
var color:UInt32 = 0
scanner.scanHexInt32(&color)
let mask = 0x000000FF
let r = Int(color >> 16) & mask
let g = Int(color >> 8) & mask
let b = Int(color) & mask
let red = CGFloat(r) / 255.0
let green = CGFloat(g) / 255.0
let blue = CGFloat(b) / 255.0
self.init(red:red, green:green, blue:blue, alpha:CGFloat(alpha))
}
convenience init(hexString: String) {
self.init(hexString: hexString, alpha: 1.0)
}
func toHexString() -> String {
var r:CGFloat = 0
var g:CGFloat = 0
var b:CGFloat = 0
var a:CGFloat = 0
getRed(&r, green: &g, blue: &b, alpha: &a)
let rgb:Int = (Int)(r*255)<<16 | (Int)(g*255)<<8 | (Int)(b*255)<<0
return NSString(format:"#%06x", rgb) as String
}
}