How to use toSetter method of ObjCInvocation class

...37  var declarationIdentifier: String { get }38  39  /// If the current invocation referrs to a property getter, convert it to the equivalent setter.40  /// - Warning: This method is not available for invocations on mocked Objective-C types.41  func toSetter() -> Self?42}43extension Invocation {44  // Avoids making `Invocation` a generic protocol.45  func isEqual(to rhs: Invocation) -> Bool {46    guard arguments.count == rhs.arguments.count else { return false }47    guard returnType == rhs.returnType else { return false }48    for (index, argument) in arguments.enumerated() {49      if argument != rhs.arguments[index] { return false }50    }51    return true52  }53}54struct SwiftInvocation: Invocation {55  let selectorName: String56  let setterSelectorName: String?57  let selectorType: SelectorType58  let arguments: [ArgumentMatcher]59  let returnType: ObjectIdentifier60  let uid = MonotonicIncreasingIndex.getIndex()61  init(selectorName: String,62       setterSelectorName: String? = nil,63       selectorType: SelectorType,64       arguments: [ArgumentMatcher],65       returnType: ObjectIdentifier) {66    // Handle argument matchers in dynamic declaration contexts.67    var resolvedArguments = arguments68    if let recorder = InvocationRecorder.sharedRecorder {69      for i in 0..<resolvedArguments.count {70        guard let matcher = recorder.getFacadeValue(at: i, argumentsCount: resolvedArguments.count)71                as? ArgumentMatcher else { continue }72        resolvedArguments[i] = matcher73      }74    }75    76    self.selectorName = selectorName77    self.setterSelectorName = setterSelectorName78    self.selectorType = selectorType79    self.arguments = resolvedArguments80    self.returnType = returnType81  }82  83  var unwrappedSelectorName: String {84    return selectorName.replacingOccurrences(of: "`", with: "")85  }86  87  var declarationIdentifier: String {88    let unwrappedSelectorName = self.unwrappedSelectorName89    guard selectorType != .method else {90      let endIndex = unwrappedSelectorName.firstIndex(of: "(") ?? unwrappedSelectorName.endIndex91      return String(unwrappedSelectorName[..<endIndex])92    }93    94    // Extract the property name.95    return unwrappedSelectorName96      .components(separatedBy: ".")97      .dropLast()98      .joined(separator: ".")99  }100  var description: String {101    guard !arguments.isEmpty else { return "'\(unwrappedSelectorName)'" }102    let matchers = arguments.map({ String(describing: $0) }).joined(separator: ", ")103    return "'\(unwrappedSelectorName)' with arguments [\(matchers)]"104  }105  106  enum Constants {107    // Keep this in sync with `MockingbirdGenerator.VariableTemplate.getterName`108    static let getterSuffix = ".getter"109    // Keep this in sync with `MockingbirdGenerator.VariableTemplate.setterName`110    static let setterSuffix = ".setter"111  }112  113  func toSetter() -> Self? {114    guard let selectorName = setterSelectorName else { return nil }115    let matcher = ArgumentMatcher(description: "any()",116                                  declaration: "any()",117                                  priority: .high) { return true }118    return Self(selectorName: selectorName,119                setterSelectorName: setterSelectorName,120                selectorType: .setter,121                arguments: [matcher],122                returnType: ObjectIdentifier(Void.self))123  }124}125/// An invocation recieved by an Objective-C.126@objc(MKBObjCInvocation) public class ObjCInvocation: NSObject, Invocation {127  let selectorName: String128  let setterSelectorName: String?129  let selectorType: SelectorType130  let arguments: [ArgumentMatcher]131  let returnType: ObjectIdentifier132  let objcReturnType: String133  let uid = MonotonicIncreasingIndex.getIndex()134  135  @objc public required init(selectorName: String,136                             setterSelectorName: String?,137                             selectorType: SelectorType,138                             arguments: [ArgumentMatcher],139                             objcReturnType: String) {140    self.selectorName = selectorName141    self.setterSelectorName = setterSelectorName142    self.selectorType = selectorType143    self.arguments = arguments144    self.returnType = ObjectIdentifier(Any?.self) // The return type as seen by Swift.145    self.objcReturnType = objcReturnType146  }147  148  var unwrappedSelectorName: String { return selectorName }149  var declarationIdentifier: String {150    return String(selectorName.split(separator: ":").first ?? "")151  }152  153  override public var description: String {154    guard !arguments.isEmpty else { return "'\(unwrappedSelectorName)'" }155    let matchers = arguments.map({ String(describing: $0) }).joined(separator: ", ")156    return "'\(unwrappedSelectorName)' with arguments [\(matchers)]"157  }158  159  func toSetter() -> Self? {160    guard let selectorName = setterSelectorName else { return nil }161    let matcher = ArgumentMatcher(description: "any()",162                                  declaration: "any()",163                                  priority: .high) { return true }164    return Self(selectorName: selectorName,165                setterSelectorName: selectorName,166                selectorType: .setter,167                arguments: [matcher],168                objcReturnType: objcReturnType)169  }170}...

1let invocation = NSInvocation(target: self, selector: #selector(ObjCInvocation.toSetter))2invocation.setArgument(&value, atIndex: 2)3invocation.invoke()4func toSetter(value: Int) {5    print("value is \(value)")6}

1let invocation = ObjCInvocation()2invocation.invoke()3let invocation = ObjCInvocation()4invocation.invoke()5let invocation = ObjCInvocation()6invocation.invoke()7let invocation = ObjCInvocation()8invocation.invoke()9let invocation = ObjCInvocation()10invocation.invoke()11let invocation = ObjCInvocation()12invocation.invoke()13let invocation = ObjCInvocation()14invocation.invoke()15let invocation = ObjCInvocation()16invocation.invoke()17let invocation = ObjCInvocation()18invocation.invoke()19let invocation = ObjCInvocation()

1var obj = ObjCInvocation()2var obj = ObjCInvocation()3var obj = ObjCInvocation()4var obj = ObjCInvocation()5var obj = ObjCInvocation()6var obj = ObjCInvocation()7var obj = ObjCInvocation()8var obj = ObjCInvocation()9var obj = ObjCInvocation()10var obj = ObjCInvocation()11var obj = ObjCInvocation()12var obj = ObjCInvocation()

1import Foundation2class MyClass {3}4let myClass = MyClass()5let inv = NSInvocation(target: myClass)6inv.selector = #selector(setter: MyClass.name)7inv.setArgument("OtherName", at: 2)8inv.invoke()9import Foundation10class MyClass {11}12let myClass = MyClass()13let inv = NSInvocation(target: myClass)14inv.selector = #selector(setter: MyClass.name)15inv.setArgument("OtherName", at: 2)16inv.invoke()17import Foundation18class MyClass {19}20let myClass = MyClass()21let inv = NSInvocation(target: myClass)22inv.selector = #selector(setter: MyClass.name)23inv.setArgument("OtherName", at: 2)24inv.invoke()25import Foundation26class MyClass {27}28let myClass = MyClass()29let inv = NSInvocation(target: myClass)30inv.selector = #selector(setter: MyClass.name)31inv.setArgument("OtherName", at: 2)32inv.invoke()33import Foundation34class MyClass {35}36let myClass = MyClass()37let inv = NSInvocation(target: myClass)38inv.selector = #selector(setter: MyClass.name)39inv.setArgument("OtherName", at: 2)40inv.invoke()41import Foundation42class MyClass {43}44let myClass = MyClass()45let inv = NSInvocation(target: myClass)46inv.selector = #selector(setter: MyClass.name)47inv.setArgument("

1import Foundation2import ObjectiveC3class Person {4}5let p = Person()6let nameSetter = class_getInstanceMethod(Person.self, #selector(setter: Person.name))7let ageSetter = class_getInstanceMethod(Person.self, #selector(setter: Person.age))8let invocation = NSInvocation(target: p)9invocation.setArgument("John", at: 2)10invocation.invoke()11invocation.setArgument(20, at: 2)12invocation.invoke()13print(p.name)14print(p.age)

1import Foundation2var invocation = NSInvocation()3var selector = Selector("setMyProperty:")4var setter = invocation.toSetter(selector)5setter(nil, 1)6import Foundation7var invocation = NSInvocation()8var selector = Selector("myProperty")9var getter = invocation.toGetter(selector)10var value = getter(nil) as Int11println(value)12import Foundation13var invocation = NSInvocation()14var selector = Selector("myProperty")15var getter = invocation.toGetter(selector)16var setter = invocation.toSetter(selector)17var value = getter(nil) as Int18setter(nil, value + 1)19println(value)20import Foundation21var invocation = NSInvocation()22var selector = Selector("myProperty")23var getter = invocation.toGetter(selector)24var setter = invocation.toSetter(selector)25var value = getter(nil) as Int26setter(nil, value + 1)27println(value)28import Foundation29var invocation = NSInvocation()30var selector = Selector("myProperty")31var getter = invocation.toGetter(selector)32var setter = invocation.toSetter(selector)33var value = getter(nil) as Int34setter(nil, value + 1)35println(value)36import Foundation37var invocation = NSInvocation()38var selector = Selector("myProperty")39var getter = invocation.toGetter(selector)40var setter = invocation.toSetter(selector)41var value = getter(nil) as Int42setter(nil, value + 1)43println(value)44import Foundation45var invocation = NSInvocation()46var selector = Selector("myProperty")47var getter = invocation.toGetter(selector)48var setter = invocation.toSetter(selector)49var value = getter(nil) as Int50setter(nil, value + 1)51println(value)52import Foundation53var invocation = NSInvocation()54var selector = Selector("myProperty")55var getter = invocation.toGetter(selector)56var setter = invocation.toSetter(selector)57var value = getter(nil) as Int58setter(nil, value + 1)59println(value)60import Foundation61var invocation = NSInvocation()62var selector = Selector("myProperty")63var getter = invocation.toGetter(selector)64var setter = invocation.toSetter(selector)65var value = getter(nil) as Int66setter(nil, value + 1)67println(value)68import Foundation

1class MyClass {2    init(name: String) {3    }4}5class MySubclass: MyClass {6    init(name: String, age: Int) {7        super.init(name: name)8    }9}