xcode9

问题 Im using UIcollection view as my tabbar when I scroll collection view horizontally previous selected cell will not deselect when i select new one this is my code to change colour when i select a cell and deselect a cell var selectedIndexPath : IndexPath = [] func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { if let cell = collectionView.cellForItem(at: indexPath) as? BottomCollectionViewCell { cell.contentView.backgroundColor = UIColor.orange cell

问题 I am trying to migrate my code from xcode 8.2 swift 3.0.2 to xcode 9 swift 4, and I have problem with this code: func test<T0, TRet>(_ fn: (T0) -> TRet) -> Void { print("foo1") print(T0.self) } func test<T0, T1, TRet>(_ fn: (T0, T1) -> TRet) -> Void { print("foo2") print(T0.self) print(T1.self) } let fn2 : (Int, Int) -> Int = { (x:Int, y:Int)->Int in return x+y } test(fn2) xcode 8.0.2, swift 3.0.2 results with: foo2 Int Int xcode 9, swift 4 results with: Playground execution failed: error:

问题 I am trying to migrate my code from xcode 8.2 swift 3.0.2 to xcode 9 swift 4, and I have problem with this code: func test<T0, TRet>(_ fn: (T0) -> TRet) -> Void { print("foo1") print(T0.self) } func test<T0, T1, TRet>(_ fn: (T0, T1) -> TRet) -> Void { print("foo2") print(T0.self) print(T1.self) } let fn2 : (Int, Int) -> Int = { (x:Int, y:Int)->Int in return x+y } test(fn2) xcode 8.0.2, swift 3.0.2 results with: foo2 Int Int xcode 9, swift 4 results with: Playground execution failed: error:

来源： https://stackoverflow.com/questions/47093252/xcode-9-stop-debugging-and-running-application-and-giving-error-the-lldb-rpc-se

来源： https://stackoverflow.com/questions/47093252/xcode-9-stop-debugging-and-running-application-and-giving-error-the-lldb-rpc-se

来源： https://stackoverflow.com/questions/47093252/xcode-9-stop-debugging-and-running-application-and-giving-error-the-lldb-rpc-se

来源： https://stackoverflow.com/questions/57104151/how-to-open-a-xcode-11-beta-4-project-in-xcode-10

来源： https://stackoverflow.com/questions/47039883/ipatool-failed-with-an-exception-nomethoderror-undefined-method-toolspath

来源： https://stackoverflow.com/questions/47039883/ipatool-failed-with-an-exception-nomethoderror-undefined-method-toolspath

问题 I have an app for which I allow the user to enable 'open at login' via a preference using a launcher app (see https://en.atjason.com/Cocoa/SwiftCocoa_Auto%20Launch%20at%20Login.html). However, when I check the box to enable it, the launcher app opens another instance of my app. 回答1: I found a bundle key that can be used for this: LSMultipleInstancesProhibited . When set to YES , another instance cannot be opened. Potential downside is that it also prohibits another logged-in user from opening