swift3

问题 I am working on migrating my project from Swift 2.3 to Swift 3 but am having issues with 3rd party frameworks that I use via Cocoapods. Many of them have already upgraded to Swift 3, yet some of them haven't. When I build my project, I get the error: Module compiled with Swift 2.3 cannot be imported in Swift 3.0: [...] I have read answers such as this one and this one, however they do not solve my problem. I cannot set SWIFT_VERSION to 2.3 if my project actually is using Swift 3, neither can

问题 I am working on building a Swift library and am hosting it on GitHub. All was going fine until I added BluetoothKit to the project. I then got an Apple Mach-O Linker Error: ld: warning: directory not found for option '-F/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.0.sdk/Developer/Library/Frameworks' ld: /Users/calebklevetertest/Library/Developer/Xcode/DerivedData/Napalm-dblvhbjdwovurocsvzrzaxzkjjyw/Build/Products/Debug

问题 I am able to change the color of an image of a UIButton from black to white with the following code: extension UIImage { func maskWith(color: UIColor) -> UIImage { UIGraphicsBeginImageContextWithOptions(size, false, scale) let context = UIGraphicsGetCurrentContext()! context.translateBy(x: 0, y: size.height) context.scaleBy(x: 1.0, y: -1.0) context.setBlendMode(.normal) let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height) context.clip(to: rect, mask: cgImage!) color.setFill()

问题 I am using swift, i need to take print of a sheet which is opened in UIWebView. let url = webView.request?.url let stringurl = url?.absoluteString let pic = UIPrintInteractionController.shared let printInfo : UIPrintInfo = UIPrintInfo(dictionary: nil) printInfo.outputType = UIPrintInfoOutputType.general printInfo.jobName = stringurl! pic.printInfo = printInfo pic.printFormatter = webView.viewPrintFormatter() pic.showsPageRange = false pic.present(animated: true, completionHandler: nil) 回答1:

问题 This question already has answers here : binary operator * cannot be applied to operands of type Int and Double (7 answers) Closed 2 years ago . I keep getting this binary operator error that "Binary operator '*' cannot be applied to operands of type 'int' and 'double' var listCount = imageNameList.count var roll: Double = SUPCalculator.degrees(motion.attitude.roll) if startDegree == 0.0 { self.startDegree = SUPCalculator.degrees(motion.attitude.roll) } var diff: Double = roll - startDegree

问题 On iOS 10.0, UICollectionView pre-fetches cells by default. This leads to cells that are prepared for being shown on screen, but are hidden. This question describes it really well. The following code will successfully deselect an index path when its cell is either visible or does not exist at all. If the cell exists and is hidden, the index path will be deselected, but the cell becomes stuck in the selected state until it is reused. collectionView!.deselectItem(at: indexPath, animated: false)

问题 I have a table view with a bunch of different sections and dynamic number of rows in each section. In the very first section I have a cell to 'select all'. Is there a quick and easy way to manually select all the cells, so the code in their didSelect triggers and next time the user presses one of the cells it triggers their didDeselect ? The only way I can think of right now is to loop through all the sections, and in each section loop through 0 < indexPath.row < section's data array count

问题 I have got a collection view inside a table view (Netflix App Style). I followed this tutorial: https://www.thorntech.com/2016/01/scrolling-in-two-directions-like-netflix-part-2-making-api-calls/ Now I want to implement a function that whenever I click on a collection view, it will pass the employee's name to the next view controller. Here is my code: import UIKit class CategoryRow: UITableViewCell, UICollectionViewDataSource { @IBOutlet weak var collectionView: UICollectionView! var jobpost

问题 I'm using a tutorial from Rosetta Code to calculate Levenshtein distance. It seems their code is in Swift2 so I get this error Binary operator '+' cannot be applied to operands of type '[Int]' and 'Repeated<String.CharacterView>' when doing this: var cur = [i + 2] + empty where let empty = repeatElement(s, count: 0) . How can I go about this? 回答1: There were a couple of changes to make. The construction of the Array empty. enumerate() is now enumerated() successor() doesn't exist anymore so I

问题 I'm using a tutorial from Rosetta Code to calculate Levenshtein distance. It seems their code is in Swift2 so I get this error Binary operator '+' cannot be applied to operands of type '[Int]' and 'Repeated<String.CharacterView>' when doing this: var cur = [i + 2] + empty where let empty = repeatElement(s, count: 0) . How can I go about this? 回答1: There were a couple of changes to make. The construction of the Array empty. enumerate() is now enumerated() successor() doesn't exist anymore so I