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POSimple Iphone Client Connection to Server
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  1. POSimple Iphone Client Connection to Server
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    copied!<p>Thanks in advance those who view my question. i am new to programming and also new to Objective-c programming, i am creating a simple client that will connect to a daytime server and request what time and date it is then print it to the screen, i have watched and read lots of tutorials right now and came up with the below code but i have a problem i cant read input from user that will enter the server address and i will use that server address in order to connect to server here is my code</p> <p>my socket codes in my controller.m file</p> <pre><code>@interface NSStream (MyAdditions) + (void)getStreamsToHostNamed:(NSString *)hostName port:(NSInteger)port inputStream:(NSInputStream **)inputStreamPtr outputStream:(NSOutputStream **)outputStreamPtr; @end @implementation NSStream (MyAdditions) + (void)getStreamsToHostNamed:(NSString *)hostName port:(NSInteger)port inputStream:(NSInputStream **)inputStreamPtr outputStream:(NSOutputStream **)outputStreamPtr { CFReadStreamRef readStream; CFWriteStreamRef writeStream; assert(hostName != nil); assert( (port &gt; 0) &amp;&amp; (port &lt; 65536) ); assert( (inputStreamPtr != NULL) || (outputStreamPtr != NULL) ); readStream = NULL; writeStream = NULL; CFStreamCreatePairWithSocketToHost( NULL, (CFStringRef) hostName, port, ((inputStreamPtr != nil) ? &amp;readStream : NULL), ((outputStreamPtr != nil) ? &amp;writeStream : NULL) ); if (inputStreamPtr != NULL) { *inputStreamPtr = [NSMakeCollectable(readStream) autorelease]; } if (outputStreamPtr != NULL) { *outputStreamPtr = [NSMakeCollectable(writeStream) autorelease]; } } @end </code></pre> <p>My Connection address and port</p> <pre><code>@implementation iPhoneClientViewController -(void) connect { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSString *address = [defaults stringForKey:@"Address"]; // this is default one if(!address) address = @"localhost"; NSLog(@"ADDRESS %@",address); [NSStream getStreamsToHostNamed: address port:13 inputStream:&amp;iStream outputStream:&amp;oStream]; [iStream retain]; [oStream retain]; [iStream setDelegate:self]; [oStream setDelegate:self]; [iStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [oStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [iStream open]; [oStream open]; } </code></pre> <p>my defaults are </p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt; &lt;plist version="1.0"&gt; &lt;dict&gt; &lt;key&gt;Title&lt;/key&gt; &lt;string&gt;iPhoneClient&lt;/string&gt; &lt;key&gt;StringsTable&lt;/key&gt; &lt;string&gt;Root&lt;/string&gt; &lt;key&gt;PreferenceSpecifiers&lt;/key&gt; &lt;array&gt; &lt;dict&gt; &lt;key&gt;Type&lt;/key&gt; &lt;string&gt;PSTextFieldSpecifier&lt;/string&gt; &lt;key&gt;Title&lt;/key&gt; &lt;string&gt;Server IP&lt;/string&gt; &lt;key&gt;Key&lt;/key&gt; &lt;string&gt;Address&lt;/string&gt; &lt;key&gt;DefaultValue&lt;/key&gt; &lt;string&gt;localhost&lt;/string&gt; &lt;key&gt;IsSecure&lt;/key&gt; &lt;false/&gt; &lt;key&gt;KeyboardType&lt;/key&gt; &lt;string&gt;NumbersAndPunctuation&lt;/string&gt; &lt;key&gt;AutoCorrectType&lt;/key&gt; &lt;string&gt;No&lt;/string&gt; &lt;/dict&gt; &lt;/array&gt; &lt;/dict&gt; &lt;/plist&gt; </code></pre> <p>i put a text field to my ViewController.m</p> <pre><code>-(BOOL)textFieldShouldReturn:(UITextField *)textField{ NSLog(@"Text Field contents %@",textField.text); [textField resignFirstResponder]; return YES; } </code></pre> <p>and when button clicked i put </p> <pre><code>- (IBAction)connectCommand:(id)sender { // NSString *address = textField.text; // this is gives me error textField undeclared // then i try this one NSString *address = text.text; if( iStream != nil) return; [self connect]; } </code></pre> <p>then i run program i enter the address then i click to connect button but it doesnt work it gives me following errors on output screen</p> <pre><code>2011-10-03 17:49:14.903 iPhoneClient[360:b303] Text Field contents 64.90.182.55 2011-10-03 17:49:16.096 iPhoneClient[360:b303] ADDRESS localhost 2011-10-03 17:49:16.101 iPhoneClient[360:b303] &gt;&gt; : NSStreamEventErrorOccurred 2011-10-03 17:49:16.102 iPhoneClient[360:b303] &lt;&lt; : NSStreamEventErrorOccurred </code></pre> <p>my event handling is like following </p> <pre><code>- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent { NSString *io; if (theStream == iStream) io = @"&gt;&gt;"; else io = @"&lt;&lt;"; NSString *event; switch (streamEvent) { case NSStreamEventNone: event = @"NSStreamEventNone - Can not connect to the host!"; break; case NSStreamEventOpenCompleted: event = @"NSStreamEventOpenCompleted"; break; case NSStreamEventHasBytesAvailable: event = @"NSStreamEventHasBytesAvailable"; if (theStream == iStream) { //read data uint8_t buffer[1024]; int len; while ([iStream hasBytesAvailable]) { len = [iStream read:buffer maxLength:sizeof(buffer)]; if (len &gt; 0) { NSString *input = [[NSString alloc] initWithBytes:buffer length:len encoding:NSASCIIStringEncoding]; if (nil != input) { //do something with data NSLog(@"%@",input); } } } } break; case NSStreamEventHasSpaceAvailable: event = @"NSStreamEventHasSpaceAvailable"; break; case NSStreamEventErrorOccurred: event = @"NSStreamEventErrorOccurred"; break; case NSStreamEventEndEncountered: event = @"NSStreamEventEndEncountered"; [self disconnect]; break; default: event = @"** Unknown"; } NSLog(@"%@ : %@", io, event); } </code></pre> <p>can any one help me with my code? or suggests me a good me a good tutorial that i can see examples of codes and learn more stuff about sockets.</p> <p>=====================================================================================================</p> <p>alright since i am new it is not allowed to reply my own post so i will edit it </p> <p>i think i will go with low level, yes dealing with xml is little bit complicating so i just disabled the parts </p> <pre><code>//NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; //NSString *address = [defaults stringForKey:@"Address"]; //if(!address) address = @"localhost";] </code></pre> <p>and put this code </p> <pre><code> NSString *address = [text text]; NSLog(@"ADDRESS %@",address); </code></pre> <p>now in my output screen i get following = </p> <pre><code>2011-10-03 18:58:57.758 iPhoneClient[424:b303] Text Field contents 64.90.182.55 2011-10-03 18:58:58.627 iPhoneClient[424:b303] ADDRESS 64.90.182.55 2011-10-03 18:58:58.685 iPhoneClient[424:b303] &gt;&gt; : NSStreamEventOpenCompleted 2011-10-03 18:58:58.686 iPhoneClient[424:b303] &lt;&lt; : NSStreamEventOpenCompleted 2011-10-03 18:58:58.686 iPhoneClient[424:b303] &lt;&lt; : NSStreamEventHasSpaceAvailable 2011-10-03 18:58:58.696 iPhoneClient[424:b303] &gt;&gt; : NSStreamEventHasBytesAvailable 2011-10-03 18:58:58.698 iPhoneClient[424:b303] &gt;&gt; : NSStreamEventEndEncountered </code></pre> <p>i thinks it says it connected but since i do nothing with data it is terminating itself because i put a run loop above?</p> <p>now anyone know how can i fetch and print date and time from server? </p>
 

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