Question

我是swift的新手。我正在运行内存泄漏的仪器工具。我发现了泄漏"_ContiguousArrayStorage<String>"

它导致了部分代码

let myData = NSData(data: request.value!)
let buffer = Array(UnsafeBufferPointer(start: UnsafePointer<CUnsignedChar>(myData.bytes), count: myData.length))

任何人都可以帮帮我吗？

以上代码有什么问题吗？

编辑：添加更多代码。

let myData = NSData(data: request.value!)
var buffer = Array(UnsafeBufferPointer(start: UnsafePointer<CUnsignedChar>(myData.bytes), count: myData.length))

let responseArray: [CUnsignedChar] = Array(buffer)

let responseValue = BluetoothCommunicationManager.sharedInstance.parseData(responseArray,length: myData.length).0

let responseName = BluetoothCommunicationManager.sharedInstance.parseData(responseArray,length: myData.length).1

NSNotificationCenter.defaultCenter().postNotificationName(responseName, object: request, userInfo: responseValue as [NSObject : AnyObject])

singleton类的parseData方法返回NSMutableDictionary。

func parseData(responseData: [CUnsignedChar]) -> NSMutableDictionary
{
        let infoDictionary = NSMutableDictionary()
        let subIndexValue = Int(responseData[5])
        infoDictionary.setValue(subIndexValue, forKey: KEY_SUB_INDEX)
        return responseData
}

提前致谢。

Answer 1

您似乎正在尝试将NSData转换为CUnsignedChar数组。您无需使用UnsafeBufferPointer或UnsafePointer进行转换。我怀疑你使用不安全的指针是导致内存泄漏的根本原因。

您可以通过传递Data对象而不是NSData对象来创建数组。试试这个：

let myData = NSData(data: request.value!) as Data
let responseArray = [CUnsignedChar](myData)

let responseValue = BluetoothCommunicationManager.sharedInstance.parseData(responseArray, length: responseArray.count).0

let responseName = BluetoothCommunicationManager.sharedInstance.parseData(responseArray, length: responseArray.count).1

Answer 2

我对一个不是Objective-C和Swift混合的项目有同样的问题。事实证明，字符串插值可能会泄漏内存：

http://www.openradar.me/26761490

TL; DR是将字符串插值更新为字符串连接。

所以：

print("Cannot write to characteristic \(request.characteristic.UUID)")

变为：

print("Cannot write to characteristic " + request.characteristic.UUID)

内存泄漏_ContiguousArrayStorage？

2 个答案: