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在此先感谢那些查看我的问题。我是编程新手，也是Objective-C编程的新手，我正在创建一个简单的客户端，它将连接到日间服务器，并请求将它的时间和日期打印到屏幕上，我已经观看并阅读了大量教程现在，并提出了下面的代码，但我有一个问题，我不能读取用户输入服务器地址的输入，我将使用该服务器地址以连接到服务器这里是我的代码简单的Iphone客户端连接到服务器
我的套接字代码在我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
我的连接地址和端口
@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];
}
我的默认值
<?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;
}
，当按钮点击我把
- (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];
}
然后我运行程序我进入地址然后我点击连接按钮，但它不起作用，它使我在输出屏幕上出现错误
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
我的事件处理是像下面
- (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);
}
任何一个可以帮助我的代码？或者向我建议我是一个很好的教程，我可以看到代码示例并了解有关套接字的更多内容。
============================================== ================================================== =====
好吧，因为我是新不允许回答我自己的职位，所以我会编辑
我想我会用低的水平去，是处理XML是有点复杂，从而我只是禁用部分
//NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
//NSString *address = [defaults stringForKey:@"Address"];
//if(!address) address = @"localhost";]
，并把这个代码
NSString *address = [text text];
NSLog(@"ADDRESS %@",address);
在我的输出画面我获得以下=
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
我认为它说，它连接，但因为我什么都不做与数据它将终止本身，因为我把上面运行循环？
现在任何人都知道如何从服务器获取并打印日期和时间？
感谢的建议，但我一定要学这种类型甚至在C BSD插座的话，我可以用其他方式解决我的问题，但我认为我解决了我的第一个问题，我想我可以连接到服务器的字符串从textfield现在，我编辑我的帖子在那里 –