写入后NSOutputStream与Bad Access崩溃(Objective-c)

概述我一直试图为我的iOS应用程序启动并运行一个基本的TCP客户端,但是遇到了一个我无法解决的问题. 到目前为止,我可以连接,发送一条消息,在服务器端收到,但随后我的应用程序崩溃. Client.h #import <Foundation/Foundation.h>@interface Client : NSObject <NSStreamDelegate>{ NSInputStream 我一直试图为我的iOS应用程序启动并运行一个基本的TCP客户端,但是遇到了一个我无法解决的问题.

到目前为止,我可以连接,发送一条消息,在服务器端收到,但随后我的应用程序崩溃.

ClIEnt.h

#import <Foundation/Foundation.h>@interface ClIEnt : NSObject <NsstreamDelegate>{    NSinputStream *inputStream;    NSOutputStream *outputStream;}-(voID)initNetworkCommunication;-(voID)send:(Nsstring*)message;@end

ClIEnt.m

#import "ClIEnt.h"@implementation ClIEnt- (voID)initNetworkCommunication {    CFReadStreamRef readStream;    CFWriteStreamRef writeStream;    CFStreamCreatePairWithSocketToHost(NulL,(CFStringRef)@"10.0.1.51",7769,&readStream,&writeStream);    inputStream = ( NSinputStream *)CFBrIDgingrelease(readStream);    outputStream = ( NSOutputStream *)CFBrIDgingrelease(writeStream);    [inputStream setDelegate:self];    [outputStream setDelegate:self];    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];    [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];    [inputStream open];    [outputStream open];}- (voID)send:(Nsstring*)message{    NSData *data = [[NSData alloc] initWithData:[message dataUsingEnCoding:NSUTF8StringEnCoding]];    [outputStream write:[data bytes] maxLength:[data length]];}- (voID)stream:(Nsstream *)theStream handleEvent:(NsstreamEvent)streamEvent {    NSLog(@"stream event %i",streamEvent);    switch (streamEvent) {        case NsstreamEventopenCompleted:            NSLog(@"Stream opened");            break;        case NsstreamEventHasBytesAvailable:            if (theStream == inputStream) {                uint8_t buffer[1024];                int len;                while ([inputStream hasBytesAvailable]) {                    len = [inputStream read:buffer maxLength:sizeof(buffer)];                    if (len > 0) {                        Nsstring *output = [[Nsstring alloc] initWithBytes:buffer length:len enCoding:NSASCIIStringEnCoding];                        if (nil != output) {                            NSLog(@"server saID: %@",output);                        }                    }                }            }            break;        case NsstreamEventErrorOccurred:            NSLog(@"Can not connect to the host!");            break;        case NsstreamEventEndEncountered:            NSLog(@"End Encountered!");            [theStream close];            [theStream removeFromrunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];            theStream = nil;            break;        default:            NSLog(@"UnkNown event");    }}@end

控制台中的输出是

2013-10-03 17:01:38.542 MMORPG[6076:70b] stream event 12013-10-03 17:01:38.543 MMORPG[6076:70b] Stream opened2013-10-03 17:01:43.495 MMORPG[6076:70b] stream event 42013-10-03 17:01:43.495 MMORPG[6076:70b] UnkNown event

好像,我的消息被发送,我接收流事件#4,然后我得到一个糟糕的访问崩溃.问题是我不知道它访问有什么问题？

任何帮助将不胜感激！

@R_502_6120@ 问题是Nsstream保持对其委托的assign / unsafe_unretained引用.如果在关闭和释放流之前释放了委托,则流将尝试在其现在取消分配的委托上调用方法,从而导致崩溃.解决方案是确保某个其他对象具有对客户端的强引用,防止其早期解除分配,或者确保在其委托被取消分配之前关闭并释放该流. 总结

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