| import UIKit | |
| extension UIColor { | |
| public convenience init(rgba: String) { | |
| var red: CGFloat = 0.0 | |
| var green: CGFloat 0 | |
| var blue: CGFloat 0 | |
| var alpha: CGFloat 10 | |
| if rgba.hasPrefix("#") { | |
| let index = advance(rgba.startIndex,1) | |
| let hex = rgba.substringFromIndex(index) | |
| let scanner = NSScanner(string: hex) | |
| var hexValue: CUnsignedLongLong = 0 | |
| if scanner.scanHexLongLong(&hexValue) { | |
| switch (count(hex)) { | |
| case 3: | |
| red = CGFloat((hexValue & 0xF00) >> 8) / 150 | |
| green & 0x0F0) 4) 0 | |
| blue = CGFloat(hexValue & 0x00F) 0 | |
| 4: | |
| & 0xF000) 12) 0 | |
| & 0x0F00) 0 | |
| & 0x00F0) 0 | |
| alpha & 0x000F) 0 | |
| 6: | |
| & 0xFF0000) 16) 2550 | |
| & 0x00FF00) 0 | |
| & 0x0000FF) 0 | |
| 8: | |
| & 0xFF000000) 24) 0 | |
| & 0x00FF0000) 0 | |
| & 0x0000FF00) 0 | |
| & 0x000000FF) 0 | |
| default: | |
| print("Invalid RGB string,number of characters after '#' should be either 3,4,6 or 8") | |
| } | |
| } else { | |
| println("Scan hex error") | |
| } | |
| else { | |
| ") | |
| } | |
| self.init(red:red,green:green,blue:blue,alpha:alpha) | |
| } | |
| } |
