[英]How do I display into an NSTextView properly? NSString / NSInputStream / NSTextView
#import "AppDelegate.h"
@implementation AppDelegate
@synthesize inputStream;
@synthesize outputStream;
@synthesize textField;
@synthesize window;
@synthesize aText;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
[self initNetworkCommunication];
}
- (void)initNetworkCommunication {
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"tec.skotos.net", 6730, &readStream, &writeStream);
inputStream = (__bridge NSInputStream *)readStream;
outputStream = (__bridge NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];
NSString *response = [NSString stringWithFormat:@"/\\/connect: n/a!!n/a"];
NSData *data = [[NSData alloc] initWithData:[response dataUsingEncoding:NSASCIIStringEncoding]];
NSString *end = @"\n";
NSData *endData = [[NSData alloc] initWithData:[end dataUsingEncoding:NSASCIIStringEncoding]];
[outputStream write:[data bytes] maxLength:[data length]];
[outputStream write:[endData bytes] maxLength:[endData length]];
}
- (IBAction)sendMessage:(id)sender {
NSString *response = [textField stringValue ];
NSData *data = [[NSData alloc] initWithData:[response dataUsingEncoding:NSASCIIStringEncoding]];
NSString *end = @"\n";
NSData *endData = [[NSData alloc] initWithData:[end dataUsingEncoding:NSASCIIStringEncoding]];
[outputStream write:[data bytes] maxLength:[data length]];
[outputStream write:[endData bytes] maxLength:[endData length]];
}
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
switch (streamEvent) {
case NSStreamEventOpenCompleted:
NSLog(@"Stream opened");
break;
case NSStreamEventHasSpaceAvailable:
NSLog(@"Has space");
break;
case NSStreamEventHasBytesAvailable:
if (theStream == inputStream) {
uint8_t buffer[900000];
long len;
while ([inputStream hasBytesAvailable]) {
len = [inputStream read:buffer maxLength:sizeof(buffer)];
if (len > 0) {
NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSASCIIStringEncoding];
NSLog(@"Has Bytes");
if (nil != output) {
NSLog(@"%@", output);
[window setString:output];
}
}
}
}
break;
case NSStreamEventEndEncountered:
NSLog(@"Error.");
break;
}
}
@end
因此,我正在寻找一种有效的方法来更改[window setString:output]方法。 这是我尝试编写的程序的.m文件,以便播放MUD(基于文本的游戏)。 输入流表示与游戏服务器的连接,该服务器发送我的客户信息(字节)。 每当hasBytesAvailable事件发生时,字节就会转换为字符串。 这些字节然后显示在窗口的文本字段中。 我遇到的问题是,每次事件发生时,它都会替换屏幕上最初显示的内容。 我试图创建一个保留输出数据的占位符字符串,然后追加到该字符串以显示。 它似乎没有按照我想要的方式工作。 我希望能够不断从流中获取数据,该流将在整个程序中连续不断地显示。 我已经尝试过NSArray和NSMutableString ...我似乎无法弄清楚如何创建全局字符串变量,每次hasBytesAvailable事件发生时我都可以附加该变量。 谢谢大家的阅读,希望能对您有所帮助。
回答有关解析HTML标签的问题。 查看NSXMLParser和NSXMLParserDelegate自己解析它们。 其他看看HTML解析选项
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