AsyncSocket EXC_BAD_ACCESS unrecognized selector sent to instance:0x6000001908e0

一、问题

IOS使用AsyncSocket 会在下面代码处报 EXC_BAD_ACCESS unrecognized selector sent to instance:0x6000001908e0

- (void)closeWithError:(NSError *)err

{

theFlags |=kClosingWithError;

if (theFlags &kDidStartDelegate)

{

// Try to salvage what data we can.

[selfrecoverUnreadData];

// Let the delegate know, so it can try to recover if it likes.

if ([theDelegaterespondsToSelector:@selector(onSocket)])

{

[theDelegateonSocketerr];

}

[selfclose];

}

二、debug

使用快捷键 command+I 打开 Xcode调试工具Instruments。

双击打开下图Zombies 。

Center

![Image 1][]

点击红色按钮，开始诊断（然后操作模拟器，复现dump 问题），会弹出如下消息提示框。点击绿色部分看到详细代码位置

![Image 1][]

Center 1

三、解决办法

从debug 发现封装的 MySocket 是僵尸对象。故改为单例模式：

MySocket.h

@interface MySocket : NSObject

{

AsyncSocket *socket;

}

@property (nonatomic,strong) AsyncSocket *socket;

+ (MySocket *)sharedSocket;

-(void)connectHost:(NSString *)host;

===========================================================================================

MySocket.m

@implementation MySocket

@synthesize socket=_socket;

+(MySocket *)sharedSocket

{

staticMySocket \*sharedInstace = nil;
staticdispatch\_once\_t onceToken;
dispatch\_once(&onceToken, ^\{ 
    sharedInstace = \[\[selfalloc\] init\];
\});
return sharedInstace;

}

-(void)connectHost:(NSString *)host{

if (!self.socket) \{ 
    self.socket = \[\[AsyncSocketalloc\] initWithDelegate:self\];
    NSError \*err =nil;
    if(!\[self.socketconnectToHost:host onPort:SOCKET\_PORTerror:&err\])
    \{ 
        NSLog(@"Connect Error: %@", err);
    \}else\{ 
        NSLog(@"Connect success!");
    \}
\}