迅速列出课程属性

使用

Mirror

这是一个纯粹的Swift解决方案，但有一些限制：

protocol PropertyNames {    func propertyNames() -> [String]}extension PropertyNames{    func propertyNames() -> [String] {        return Mirror(reflecting: self).children.flatMap { $0.label }    }}class Person : PropertyNames {    var name = "Sansa Stark"    var awesome = true}Person().propertyNames() // ["name", "awesome"]

局限性：

• 返回Objective-C对象的空数组

• 将不返回计算的属性，即：

  var favoriteFood: String { return "Lemon Cake" }

• 如果

  self

  是类的实例（相对于结构），则不会报告其超类的属性，即：

  class Person : PropertyNames {var name = "Bruce Wayne"

  }

  class Superhero : Person {
  var hasSuperpowers = true
  }
  
  

  Superhero().propertyNames() // [“hasSuperpowers”] — no “name”

您可以

superclassMirror()

使用

class_copyPropertyList

如果使用的是Objective-C对象，则可以使用以下方法：

var count = UInt32()let classToInspect = NSURL.selflet properties : UnsafeMutablePointer <objc_property_t> = class_copyPropertyList(classToInspect, &count)var propertyNames = [String]()let intCount = Int(count)for var i = 0; i < intCount; i++ {    let property : objc_property_t = properties[i]    guard let propertyName = NSString(UTF8String: property_getName(property)) as? String else {        debugPrint("Couldn't unwrap property name for (property)")        break    }    propertyNames.append(propertyName)}free(properties)print(propertyNames)

到控制台的输出是否

classToInspect

NSURL

["pathComponents", "lastPathComponent", "pathExtension","URLByDeletingLastPathComponent", "URLByDeletingPathExtension","URLByStandardizingPath", "URLByResolvingSymlinksInPath","dataRepresentation", "absoluteString", "relativeString", "baseURL","absoluteURL", "scheme", "resourceSpecifier", "host", "port", "user","password", "path", "fragment", "parameterString", "query", "relativePath","hasDirectoryPath", "fileSystemRepresentation", "fileURL","standardizedURL", "filePathURL"]

这在操场上行不通。只需替换

NSURL

EachDayCell