Swift1.2 -> Swift2

Swift2への移行対応で行なったこと ###'#' has been removed from Swift; double up 'xxx xxx' to make the argument label the same as the parameter name `#` が廃止になったので第一引数に外部引数名が必要な場合は同じ引数名をつけてあげる ```swift // swift1.2 func say(#xxx: String) { print(xxx) } say(xxx: "Hello") // swift2 func say(xxx xxx: String) { print(xxx) } say(xxx: "Hello") ``` ###Extraneous argument label 'xxx:' in call 第一引数に外部引数名が付いてない場合は呼び出し元のラベルを削除する ```swift // swift1.2 func say(xxx: String) { print(xxx) } say(xxx: "Hello") // swift2 func say(xxx: String) { print(xxx) } say("Hello") ``` ###A non-failable initializer cannot chain to failable initializer 'init(coder:)' written with 'init?' 初期化に失敗する可能性のある `initializer` の場合は `init` の後に `?` を付ける ```swift // swift1.2 required init(coder aDecoder: NSCoder) { self.xxx = "foo" super.init(coder: aDecoder) } // swift2 required init?(coder aDecoder: NSCoder) { self.xxx = "foo" super.init(coder: aDecoder) } ``` ###Invalid use of '()' to call a value of non-function type 'xxx?' 一部プロパティ化したので対応 ```swift // swift1.2 let indexPath = tableView.indexPathForSelectedRow() // swift2 let indexPath = tableView.indexPathForSelectedRow ``` ```swift // swift1.2 let section = tableView.numberOfSections() // swift2 let section = tableView.numberOfSections ``` ```swift // swift1.2 view.setTranslatesAutoresizingMaskIntoConstraints(false) // swift2 view.translatesAutoresizingMaskIntoConstraints = false ``` ###Downcast from '[xxx]?' to '[xxx]' only unwraps optionals; did you mean to use '!'? ジェネリクスの影響でdowncast不要に ```swift // swift1.2 let queryItems = urlComponents.queryItems as? [NSURLQueryItem] ?? [] // swift2 let queryItems = urlComponents.queryItems ?? [] ``` ```swift // swift1.2 let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as? String ?? "" // swift2 let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first ?? "" ``` ```swift // swift1.2 let cell = tableView.dequeueReusableCellWithIdentifier("CellID") as? UITableViewCell ?? UITableViewCell() // swift2 let cell = tableView.dequeueReusableCellWithIdentifier("CellID") ?? UITableViewCell() ``` ```swift // swift1.2 let cookies = NSHTTPCookieStorage.sharedHTTPCookieStorage().cookies as? [NSHTTPCookie] // swift2 let cookies = NSHTTPCookieStorage.sharedHTTPCookieStorage().cookies ``` ###'stringByAppendingPathComponent' is unavailable: Use URLByAppendingPathComponent on NSURL instead. `String` の `stringByAppendingPathComponent` が廃止されたので `NSString` にcastするか、一度NSURLに変換する ```swift // swift1.2 path = path.stringByAppendingPathComponent(append) // swift2 path = (path as NSString).stringByAppendingPathComponent(append) // or path = NSURL(string: path)?.URLByAppendingPathComponent(append).path ?? "" ``` ###'reflect' is unavailable: call the 'Mirror(reflecting:)' initializer `reflect` 関数が廃止、代わりに `Mirror(reflecting:)` を使用する ```swift // swift1.2 let ref = reflect(obj) for var i = 0; i < ref.count; ++i { let key = ref[i].0 let value = ref[i].1.value } // swift2 let ref = Mirror(reflecting: obj) for child in ref.children { guard let key = child.label else { continue } let value = child.value } ``` ###Cannot invoke 'count' with an argument list of type '(String)' `count` 関数が廃止、代わりに `characters.count` を使用する ```swift // swift1.2 let count = count(str) // swift2 let count = str.characters.count ``` ###'contains' is unavailable: call the 'contains()' method on the sequence `contains` 関数が廃止、代わりにメソッドの `contains()` を使用する ```swift // swift1.2 let isExists = contains(["foo", "bar"], "foo") // swift2 let isExists = ["foo", "bar"].contains("foo") ``` ###'find' is unavailable: call the 'indexOf()' method on the collection `find` 関数が廃止、代わりに `indexOf()` を使用する ```swift // swift1.2 let index = find(["foo", "bar"], "foo") // swift2 let index = ["foo", "bar"].indexOf("foo") ``` ###Cannot invoke 'join' with an argument list of type '(String, [String])' `join` 関数が廃止、代わりに `joinWithSeparator()` を使用する ```swift // swift1.2 let str = join("_", ["foo", "bar"]) // swift2 let str = ["foo", "bar"]. joinWithSeparator("_") ``` ###'reverse' is unavailable: call the 'reverse()' method on the collection `reverse ` 関数が廃止、代わりにメソッドの `reverse()` を使用する ```swift // swift1.2 let newArray = reverse(["foo", "bar"]) // swift2 let newArray = ["foo", "bar"].reverse() ``` ###Extra argument 'error' in call error周りは `try` を使用するように変更 ```swift // swift1.2 NSFileManager.defaultManager().removeItemAtPath(path, error: nil) // swift2 do { try NSFileManager.defaultManager().removeItemAtPath(path) } catch {} ``` ```swift // swift1.2 let regex = NSRegularExpression(pattern: pattern, options: .CaseInsensitive, error: nil) // swift2 guard let regex = try? NSRegularExpression(pattern: pattern, options: .CaseInsensitive) else { return } ``` ```swift // swift1.2 let str = String(contentsOfFile: path, encoding:NSUTF8StringEncoding, error: nil) ?? "" // swift2 let str = (try? String(contentsOfFile: path, encoding:NSUTF8StringEncoding)) ?? "" ``` ###Nil is not compatible with expected argument type 'NSStringCompareOptions' 一部オプションに `nil` が指定できなくなっている ```swift // swift1.2 str = str.stringByReplacingOccurrencesOfString("foo", withString: "bar", options: nil, range: nil) // swift2 str = str.stringByReplacingOccurrencesOfString("foo", withString: "bar") // or str = str.stringByReplacingOccurrencesOfString("foo", withString: "bar", options: [], range: nil) // or str = str.stringByReplacingOccurrencesOfString("foo", withString: "bar", options: .CaseInsensitiveSearch, range: nil) ``` ###Type of expression is ambiguous without more context `.allZeros` 廃止 `[]` に変更 ```swift // swift1.2 let str = data.base64EncodedStringWithOptions(.allZeros) ?? "" // swift2 let str = data.base64EncodedStringWithOptions([]) ?? "" ``` ###Binary operator '|' cannot be applied to two 'UIViewAutoresizing' operands option set は `|` でなく配列に変更 ```swift // swift1.2 view.autoresizingMask = .FlexibleWidth | .FlexibleTopMargin // swift2 view.autoresizingMask = [.FlexibleWidth, .FlexibleTopMargin] ``` ###'toInt()' is unavailable: Use Int() initializer `toInt()` が廃止されたので `Int()` に変更 ```swift // swift1.2 let number = str.toInt() // swift2 let number = Int(str) ``` ###Cannot convert value of type 'inout Unmanaged<AnyObject>?' (aka 'inout Optional<Unmanaged<AnyObject>>') to expected argument type 'UnsafeMutablePointer<AnyObject?>' (aka 'UnsafeMutablePointer<Optional<AnyObject>>') `SecItemCopyMatching` の引数の型が変わってるので変更 ```swift // swift1.2 var dataTypeRef: Unmanaged<AnyObject>? let status = SecItemCopyMatching(query, &dataTypeRef) let data = dataTypeRef?.takeRetainedValue() as? NSData // swift2 var dataTypeRef: AnyObject? let status = SecItemCopyMatching(query, &dataTypeRef) let data = dataTypeRef as? NSData ``` ###Value of optional type 'String?' not unwrapped; did you mean to use '!' or '?'? `UITextField.text` が `Optional` になっている... ```swift // swift1.2 let str: String = textField.text // swift2 let str: String = textField.text ?? "" ``` ###Redundant conformance of 'MyClass' to protocol 'Equatable' `NSObject` にすでに `Equatable` が実装されているのでので外す ```swift // swift1.2 class MyClass: NSObject, Equatable { } // swift2 class MyClass: NSObject { } ``` ###'init()' is unavailable: use 'init(domain:code:userInfo:)' `NSError` の `init` が引数必須になっているので変更 ```swift // swift1.2 let error = NSError() // swift2 let error = NSError(domain: "", code: 0, userInfo: [:]) ``` ###ATSの対応 * <http://qiita.com/peromasamune/items/f5b72c4dbd33b5019611> * <http://dev.classmethod.jp/smartphone/iphone/ios-9-intro-ats/> ##参考 * <http://stackoverflow.com/questions/32101336/reflection-swift-2-0-xcode-7-beta-5> * <http://stackoverflow.com/questions/32378013/swift-2-0-keychain-type-errors-for-secitemcopymatching> * <http://stackoverflow.com/questions/32621022/why-was-uitextfields-text-property-changed-to-an-optional-in-swift-2> * <http://qiita.com/bloody_snow/items/9d7571552614655250cc> * <http://qiita.com/yokomotod/items/543265a841e27fe45903#as-%E9%80%A3%E9%8E%96> * <http://qiita.com/shiratsu/items/3960f8f91a58ee69c002>