有没有办法获得一个类的变量和函数列表

Question

有没有办法获得一个类的变量和函数列表？

例如： 如果我的类就像下面

class Person { 
    var age: Int! 
    var name: String! 
    func isOlder(from person: Person) -> Bool { } 
    func hasSameName(as person: Person) -> Bool { } 
} 

我想2所列出：

1. [age, name] 
2. [isOlder(_ :), hasSameName(_ :)] 

或类似的东西。

由于

Answer 1

在目标C

#import <objc/runtime.h> 

getDetailsOfClass(Class clz) { 

    unsigned int methodCount = 0; 
    Method *methods = class_copyMethodList(clz, &methodCount); 

    printf("Found %d methods on '%s'\n", methodCount, class_getName(clz)); 

    for (unsigned int i = 0; i < methodCount; i++) { 
     Method method = methods[i]; 

     printf("\t'%s' has method named '%s' of encoding '%s'\n", 
       class_getName(clz), 
       sel_getName(method_getName(method)), 
       method_getTypeEncoding(method)); 
    } 

    free(methods); 
} 

调用：getDetailsOfClass(class)

在夫特

按照SO Post。实施了同样的成功。

要获取方法名称：

func printMethodNamesForClass(cls: AnyClass) { 
    var methodCount: UInt32 = 0 
    let methodList = class_copyMethodList(cls, &methodCount) 
    if methodList != nil && methodCount > 0 { 
     enumerateCArray(methodList, methodCount) { i, m in 
      let name = methodName(m) ?? "unknown" 
      println("#\(i): \(name)") 
     } 

     free(methodList) 
    } 
} 
func enumerateCArray<T>(array: UnsafePointer<T>, count: UInt32, f: (UInt32, T) ->()) { 
    var ptr = array 
    for i in 0..<count { 
     f(i, ptr.memory) 
     ptr = ptr.successor() 
    } 
} 
func methodName(m: Method) -> String? { 
    let sel = method_getName(m) 
    let nameCString = sel_getName(sel) 
    return String.fromCString(nameCString) 
} 
func printMethodNamesForClassNamed(classname: String) { 
// NSClassFromString() is declared to return AnyClass!, but should be AnyClass? 
let maybeClass: AnyClass? = NSClassFromString(classname) 
if let cls: AnyClass = maybeClass { 
printMethodNamesForClass(cls) 
} 
else { 
println("\(classname): no such class") 
} 
} 

编码快乐..

Answer 2

我相信你可以使用Mirror API此： https://developer.apple.com/documentation/swift/mirror

斯威夫特4新的关键路径API还可能有帮助： https://github.com/apple/swift-evolution/blob/master/proposals/0161-key-paths.md