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1、 http:/www.mobiletrain.orgios开发之iOS Socket 开发这个类使用了Singleton，因此永远只有一个实例。没有实例时会自动生成实例，可以在程序中的任何位置调用它。一般来说，只要跟服务器建立一次连接即可，产生一对stream，分别是outStream和inStream，所有的数据都通过它们不断地发送和接收。stream的end意味着连接中断，如果还需要访问服务器的话，得重新连接stream。（也就是重新实例化一下我这个类）每次发送和接受的数据包大小需要自己控制，而不是等stream来告诉你这个数据包有多大，因为stream不会告诉你控制方法之一：通过添加一个
2、特殊的后缀来判断，比如“”，每次读到这个组合就认为数据读完。但是问题很明显，这个只能用于string。控制方法之二：通过添加一个4字节的前缀来判断长度。这4个byte的byte数组，是当前数据包的长度信息，根据这个信息来读取一定长度的数据。每次数据收完后，我用了一个取巧的方法来把数据返还给调用stream的函数这个部分需要改进。SynthesizeSingleton.h，实现singleton的类1. /2. /SynthesizeSingleton.h3. /CocoaWithLove4. /5. /Created by Matt Gallagher on 20/10/08.6. /Copy
3、right 2009 Matt Gallagher. All rights reserved.7. /8. /Permission is given to use this source code file without charge in any9. /project, commercial or otherwise, entirely at your risk, with the condition10. /that any redistribution (in part or whole) of source code must retain11. /this copyright an
4、d permission notice. Attribution in compiled projects is12. /appreciated but not required.13. /14. 15. #define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) 16. 17. static classname *shared#classname = nil; 18. 19. + (classname *)shared#classname 20. 21. synchronized(self) 22. 23. if (shared#classname =
5、 nil) 24. 25. shared#classname = self alloc init; 26. 27. 28. 29. return shared#classname; 30. 31. 32. + (id)allocWithZone:(NSZone *)zone 33. 34. synchronized(self) 35. 36. if (shared#classname = nil) 37. 38. shared#classname = super allocWithZone:zone; 39. return shared#classname; 40. 41. 42. 43. r
6、eturn nil; 44. 45. 46. - (id)copyWithZone:(NSZone *)zone 47. 48. return self; 49. 50. 51. - (id)retain 52. 53. return self; 54. 55. 56. - (NSUInteger)retainCount 57. 58. return NSUIntegerMax; 59. 60. 61. - (void)release 62. 63. 64. 65. - (id)autorelease 66. 67. return self; 68. 复制代码Stream.h 1. #impo
7、rt 2. #import 3. #import 4. #import 5. #import 6. 7. interface Stream : NSObject 8. NSInputStream *inStream;9. NSOutputStream *outStream;10. NSMutableData *dataBuffer;11. 12. BOOL _hasEstablished;13. id _currentObject;14. int _numCondition;15. 16. BOOL _isFirstFourBytes;17. uint remainingToRead;18.
8、19. 20. + (Stream *)sharedStream;21. -(void)requestData:(NSString *)requestString whoRequest:(id)currentObject condition:(int)numCondition;22. -(void)manageData:(NSData *)receivedData;23. endStream.m 1. #import Stream.h2. #import SynthesizeSingleton.h3. 4. implementation Stream5. 6. SYNTHESIZE_SINGL
9、ETON_FOR_CLASS(Stream);7. 8. -(void)startClient9. 10. _hasEstablished = NO;11. CFReadStreamRef readStream = NULL;12. CFWriteStreamRef writeStream = NULL;13. NSString *server = /*你的服务器地址，比如我公司服务器地址 /这里没有用NSStream的getStreamsToHost，是因为真机编译时有黄色提示说不存在这个函数。15. /虽然真机能用，但我担心上传到APP Store时会被reject，所以就用了更底层的CF
10、StreamCreatePairWithSocketToHost。16. /其实一点都不难，一样用的17. CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault,18. (CFStringRef)server,19. 1234,/服务器接收数据的端口20. &readStream,21. &writeStream);22. 23. 24. if(readStream & writeStream)25. 26. inStream = (NSInputStream *)readStream;27. outStream = (NSOutputS
11、tream *)writeStream;28. 29. else30. 31. /Error Control32. 33. 34. 35. -(void)closeStreams36. PromptView sharedPromptView dismissPromptView;37. inStream close;38. outStream close;39. inStream removeFromRunLoop:NSRunLoop currentRunLoop forMode:NSDefaultRunLoopMode;40. outStream removeFromRunLoop:NSRun
12、Loop currentRunLoop forMode:NSDefaultRunLoopMode;41. inStream setDelegate:nil;42. outStream setDelegate:nil;43. inStream release;44. outStream release;45. inStream = nil;46. outStream = nil;47. 48. 49. -(void)openStreams50. inStream retain;51. outStream retain;52. inStream setProperty:NSStreamSocketSecurityLevelSSLv3 forKey:NSStreamSocketSecurit
