I was having this exact same problem. Please make sure that you are on Xcode 7.3 and using Swift 2.2. You can check your Swift version using xcrun swift -version. Updating Xcode to 7.3 should also automatically update Swift. Updating Xcode resolved this issue for me.
Types of Things in Swift The rule is: Class instances are reference types (i.e. your reference to a class instance is effectively a pointer) Functions are reference types Everything else is a value type; “everything else” simply means instances of structs and instances of enums, because that’s all there is in Swift. Arrays and strings are struct instances, for example. You can pass … Read more
Converting Int to String: And the other way around – converting String to Int: Or if you’re using Swift 2 or 3:
Currently my build is working. Here you are the steps I tried until it finally worked: Search in the whole project the word CommonCrypto. If you have a Pod containing that header import, remove this Pod from the Podfile and perform a pod install. Clean and build the project. Add again the Pod to the … Read more
Swift itself doesn’t use selectors — several design patterns that in Objective-C make use of selectors work differently in Swift. (For example, use optional chaining on protocol types or is/as tests instead of respondsToSelector:, and use closures wherever you can instead of performSelector: for better type/memory safety.) But there are still a number of important ObjC-based APIs that use selectors, including timers … Read more
I am seeing examples of code using SKError “code” property or variable. I cannot seem to define any definition for this property. How is xcode / Swift able to access this property? I am using SwiftyStoreKit with this issue. Thanks Tried looking in the documentation for SKError, nothing there. Tried debugging in xcode, live, cannot … Read more
Basic Idea, note that this only works in Swift 1.x (check out ParaSara’s answer to see how it works in Swift 2.x): Update for Swift 4
You have your storyboard set up to expect an outlet called tableView but the actual outlet name is myTableView. If you delete the connection in the storyboard and reconnect to the right variable name, it should fix the problem.
The error message is quite clear. You cannot declare an extension inside of anything – inside a class declaration, inside a struct declaration, etc. It must be outside of everything, at the top level of the containing file. There must be no curly braces around it. You have not shown the context in which you are declaring this extension, but clearly there are curly … Read more
The example below is an adaptation and simplification of a longer post from We ❤ Swift. This is what it will look like: Create a New Project It can be just the usual Single View Application. Add the Code Replace the ViewController.swift code with the following: Read the in-code comments to see what is happening. The highlights are The … Read more