检索功能数据 [英] Retrieving Function Data

问题描述

我有它的数据我真的想检索功能。

I have a function whose data I would really like to retrieve.

在方括号中，我能够打印出值德codedData 。

Within the brackets, I am able to print out the value DecodedData.

不过，如果我是把打印（德codedData）外面的功能，X code告诉我，'预期的声明，怎么会我能有德codedData 整个文件访问？

However, if I was to put print(DecodedData) just outside the function, Xcode tells me that 'Expected declaration' how would I be able to have DecodedData accessible throughout the file?

我使用的委托方法没有成功尝试，是有没有其他办法？如果是的话，我将如何去这样做呢？

I've tried using the delegate method with no success, is there any other way? and if so, how would I go about doing it?

var DecodedData = ""
//Reading Bluetooth Data
func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {

    if let data = characteristic.value {
        DecodedData = String(data: data, encoding: NSUTF8StringEncoding)!
    }

    print(DecodedData)
}

我怎么会去有变量德codedData 整座不同斯威夫特文件？

How would I go about having the variable DecodedData available throughout different Swift files?

推荐答案

您可以在类中创建静态变量，并使用它的任何其他文件的快捷

you can create static variable in the class and use it any other swift file.

class YourClass {
static var DecodedData: String = ""
 ...


 func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {

   if let data = characteristic.value {
     YourClass.DecodedData = String(data: data, encoding: NSUTF8StringEncoding)!
   }
print(YourClass.DecodedData)
}
}

也可以创建yourclas的单独的对象。

or you can create singleton object of yourclas.

class YourClass {

 static let singletonInstance = YourClass()

 var DecodedData: String = ""

 private init() {
 }

func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {

if let data = characteristic.value {
  self.DecodedData = String(data: data, encoding: NSUTF8StringEncoding)!
}
}
}

和其他类，你可以通过单独的对象使用。

and in other class you can use by singleton object.

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