Question

我有以下课程

class Appointment: NSObject {

      var id:NSString!
      var status:NSString!

      var clinic:Clinic!
      var medicalCase:MedicalCase!
      var patient:Patient!

      var appointmentDate:NSString!
      var reasonForVisit:NSString!
      var cancellationReason:NSString!
      var visit:NSString!

}

此代码解析nsdisctionary并将值赋给Appointment对象属性

        if let appointments:NSArray! = topApps["apointments"] as? NSArray {

             dashboardRecord.apointments = NSMutableArray()

            for disc in appointments
            {
                var appointment:Appointment! = Appointment()
              if let status: NSString! = disc["status"] as? NSString {
                    appointment.status = status
                }
            }

        }

现在我想动态地做。而不是像这样做

          if let status: NSString! = disc["status"] as? NSString {
                appointment.status = status
            }

我想动态地执行此操作，下面的代码从光盘中获取值而无需手动写入密钥，但如何将这些值分配给约会对象属性。有没有办法从字符串中获取对象属性？

           var properties = appointments.propertyNames()//giving me array of property names.

            for key in properties
            {

            }

想要做一些事情（只是为了解释我想要实现的目标）

约会。[“key”] = disc [key] //约会是约会类的对象

Answer 1

如果您愿意继承NSObject，可以使用key-value coding。这是一个使用类型检查的例子（在Playground中运行）：

class Foo : NSObject {
    var bar: NSString! = ""
    var boing: NSString! = ""

    func parse(input: [NSString : NSObject]) {
        // List all the keys that should have string values.
        let stringKeys = [ "bar", "boing" ]

        for (key, value) in input {
            if !key.isKindOfClass(NSString) {
                // Safe-guard. We want the keys to always be strings.
                continue;
            }

            if contains(stringKeys, key as String) && value.isKindOfClass(NSString) {
                self.setValue(value, forKey: key as String)
            }
        }
    }
}

let f = Foo()
f.parse( [ "bar" : "someValue", "boing" : "anotherValue" ] )
println(f.bar)
println(f.boing)

如何从字符串swift获取对象的属性

1 个答案: