| extension CGImage { | |
| var isDark: Bool { | |
| get { | |
| guard let imageData = self.dataProvider?.data else { return false } | |
| guard let ptr = CFDataGetBytePtr(imageData) else { return false } | |
| let length = CFDataGetLength(imageData) | |
| let threshold = Int(Double(self.width * self.height) * 0.45) | |
| var darkPixels = 0 | |
| for i in stride(from: 0, to: length, by: 4) { | |
| let r = ptr[i] |
NOTE (2022-07-09): Xcode finally added this functionality in Xcode 14, please see release notes here:
New Features in Xcode 14 Beta 3
When editing code, the Edit > Duplicate menu item and its corresponding keyboard shortcut now duplicate the selected text — or the line that currently contains the insertion point, if no text is selected. (8614499) (FB5618491)
