iOS中的CFStreamCreatePairWithSocketToHost内存泄漏

概述我使用NSInputstream& NSOutputstream用于设置连接和发送数据.我的流对象具有打开和关闭流的功能.我使用以下代码： @interface Stream(){ NSInputStream *inputStream; NSOutputStream *outputStream;}-(id)init{ self = [super init]; 我使用NSinputstream& NSOutputstream用于设置连接和发送数据.我的流对象具有打开和关闭流的功能.我使用以下代码：

@interface Stream(){    NSinputStream *inputStream;    NSOutputStream *outputStream;}-(ID)init{    self = [super init];    if (self)    {        inputStream = nil;        outputStream = nil;    }    return self;}-(int)streamOpenWithIp:(Nsstring *)ip withPortNumber:(int)portNumber;{        CFReadStreamRef readStream;        CFWriteStreamRef writeStream;        CFStreamCreatePairWithSocketToHost(kcfAllocatorDefault,(__brIDge CFStringRef)ip,portNumber,&readStream,&writeStream);        if(readStream && writeStream)        {             //Setup inpustream            inputStream = (__brIDge NSinputStream *)readStream;            [inputStream setDelegate:self];            [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];            [inputStream open];            //Setup outputstream            outputStream = (__brIDge NSOutputStream *)writeStream;            [outputStream setDelegate:self];            [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];            [outputStream open];        }}- (int)streamClose;{         CFReadStreamSetProperty((__brIDge CFReadStreamRef)(inputStream),kcfStreamPropertyShouldCloseNativeSocket,kcfBooleanTrue);        CFReadStreamSetProperty((__brIDge CFReadStreamRef)(outputStream),kcfBooleanTrue);        //Close and reset inputstream        [inputStream setDelegate:nil];        [inputStream close];        [inputStream removeFromrunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];        inputStream = nil;        //Close and reset outputstream        [outputStream setDelegate:nil];        [outputStream close];        [outputStream removeFromrunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];        outputStream = nil;}

当我多次打开和关闭流时,此代码工作正常.当我使用Instruments检查我的应用程序内存泄漏时,它说CFStreamCreatePairWithSocketToHost函数泄漏了72％的内存.有人知道我做错了什么吗？我无法弄明白.

解决方法 添加CFRelease((CFStreamRef)inputStream);和CFRelease((CFStreamRef)outputStream);在streamClose方法中.

当CFStreamCreatePairWithSocketToHost返回时,readStream和writeStream的所有权将传递给您：

Ownership follows the Create Rule in Memory Management Programming GuIDe for Core Foundation.

即使使用ARC,也需要明确释放Core Foundation对象：

The compiler does not automatically manage the lifetimes of Core Foundation objects; youmust call CFRetain and CFRelease (or the corresponding type-specific variants) as dictated by the Core Foundation memory management rules (see Memory Management Programming GuIDe for Core Foundation).

或者,更改此行(以及outputStream的相应行)：

inputStream = (__brIDge NSinputStream *)readStream;

至：

inputStream = (__brIDge_transfer NSinputStream *)readStream;

这是因为readStream具有ARC未知的优秀保留计数.通过给ARC指定此指针的所有权,您授予它在适当时间释放指针的权限.进一步阅读：1,2

总结

以上是内存溢出为你收集整理的iOS中的CFStreamCreatePairWithSocketToHost内存泄漏全部内容，希望文章能够帮你解决iOS中的CFStreamCreatePairWithSocketToHost内存泄漏所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。