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在此先感謝那些查看我的問題。我是編程新手，也是Objective-C編程的新手，我正在創建一個簡單的客戶端，它將連接到日間服務器，並請求將它的時間和日期打印到屏幕上，我已經觀看並閱讀了大量教程現在，並提出了下面的代碼，但我有一個問題，我不能讀取用戶輸入服務器地址的輸入，我將使用該服務器地址以連接到服務器這裏是我的代碼簡單的Iphone客戶端連接到服務器
我的套接字代碼在我Controller.m或者文件
@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 > 0) && (port < 65536));
assert((inputStreamPtr != NULL) || (outputStreamPtr != NULL));
readStream = NULL;
writeStream = NULL;
CFStreamCreatePairWithSocketToHost(
NULL,
(CFStringRef) hostName,
port,
((inputStreamPtr != nil) ? &readStream : NULL),
((outputStreamPtr != nil) ? &writeStream : NULL)
);
if (inputStreamPtr != NULL) {
*inputStreamPtr = [NSMakeCollectable(readStream) autorelease];
}
if (outputStreamPtr != NULL) {
*outputStreamPtr = [NSMakeCollectable(writeStream) autorelease];
}
}
@end
我的連接地址和端口
@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:&iStream outputStream:&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];
}
我的默認值
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Title</key>
<string>iPhoneClient</string>
<key>StringsTable</key>
<string>Root</string>
<key>PreferenceSpecifiers</key>
<array>
<dict>
<key>Type</key>
<string>PSTextFieldSpecifier</string>
<key>Title</key>
<string>Server IP</string>
<key>Key</key>
<string>Address</string>
<key>DefaultValue</key>
<string>localhost</string>
<key>IsSecure</key>
<false/>
<key>KeyboardType</key>
<string>NumbersAndPunctuation</string>
<key>AutoCorrectType</key>
<string>No</string>
</dict>
</array>
</dict>
</plist>
我把文本字段我ViewController.m
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
NSLog(@"Text Field contents %@",textField.text);
[textField resignFirstResponder];
return YES;
}
，當按鈕點擊我把
- (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];
}
然後我運行程序我進入地址然後我點擊連接按鈕，但它不起作用，它使我在輸出屏幕上出現錯誤
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] >> : NSStreamEventErrorOccurred
2011-10-03 17:49:16.102 iPhoneClient[360:b303] << : NSStreamEventErrorOccurred
我的事件處理是像下面
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent
{
NSString *io;
if (theStream == iStream) io = @">>";
else io = @"<<";
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 > 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);
}
任何一個可以幫助我的代碼？或者向我建議我是一個很好的教程，我可以看到代碼示例並瞭解有關套接字的更多內容。
============================================== ================================================== =====
好吧，因爲我是新不允許回答我自己的職位，所以我會編輯
我想我會用低的水平去，是處理XML是有點複雜，從而我只是禁用部分
//NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
//NSString *address = [defaults stringForKey:@"Address"];
//if(!address) address = @"localhost";]
，並把這個代碼
NSString *address = [text text];
NSLog(@"ADDRESS %@",address);
在我的輸出畫面我獲得以下=
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] >> : NSStreamEventOpenCompleted
2011-10-03 18:58:58.686 iPhoneClient[424:b303] << : NSStreamEventOpenCompleted
2011-10-03 18:58:58.686 iPhoneClient[424:b303] << : NSStreamEventHasSpaceAvailable
2011-10-03 18:58:58.696 iPhoneClient[424:b303] >> : NSStreamEventHasBytesAvailable
2011-10-03 18:58:58.698 iPhoneClient[424:b303] >> : NSStreamEventEndEncountered
我認爲它說，它連接，但因爲我什麼都不做與數據它將終止本身，因爲我把上面運行循環？
現在任何人都知道如何從服務器獲取並打印日期和時間？
感謝的建議，但我一定要學這種類型甚至在C BSD插座的話，我可以用其他方式解決我的問題，但我認爲我解決了我的第一個問題，我想我可以連接到服務器的字符串從textfield現在，我編輯我的帖子在那裏 –