我想要再ipad程序里面,用代码给打印机发送一段字符串,然后打印。
各位,我的问题没有说清楚,不好意思。
情况是这样的,我现在想要连接到打印机,wifi的,然后给打印机发送一个字符串去打印。连接打印机不知道怎么连接,然后发送消息这个也不知道咋整。各位帮帮忙。
打印机和ipad在同一个局域网下,想用socket通过打印机的ip地址进行传送要打印的内容。
6条回答 默认 最新
- lwq421336220 2012-12-27 01:27关注
.h 里面
#import <UIKit/UIKit.h> #import "AsyncSocket.h" @interface ViewController : UIViewController<AsyncSocketDelegate> { AsyncSocket *asyncSocket; } @end
.m里面
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // NSError *err = nil; // if(![asyncSocket connectToHost:@"192.168.1.105" onPort:18011 error:&err]) // { // asyncSocket = [[AsyncSocket alloc] initWithDelegate:self]; // // [asyncSocket setRunLoopModes:[NSArray arrayWithObject:NSRunLoopCommonModes]]; // // if (![self SocketOpen:@"192.168.1.105" port:18011]) // { // NSMutableString *sendString=[NSMutableString stringWithCapacity:1000]; // [sendString appendString:@"非警务健身房"]; // NSData *cmdData = [sendString dataUsingEncoding:NSUTF8StringEncoding]; // // [asyncSocket writeData:cmdData withTimeout:-1 tag:0]; // } // NSLog(@"Error: %@", err); // } } -(IBAction)haha:(id)sender{ asyncSocket=nil; NSError *err = nil; if(![asyncSocket connectToHost:@"192.168.1.105" onPort:18011 error:&err]) { asyncSocket = [[AsyncSocket alloc] initWithDelegate:self]; [asyncSocket setRunLoopModes:[NSArray arrayWithObject:NSRunLoopCommonModes]]; if (![self SocketOpen:@"192.168.1.105" port:18011]) { NSMutableString *sendString=[NSMutableString stringWithCapacity:100000]; [sendString appendString:@"Socket测试成功!!!!"]; NSData *cmdData = [sendString dataUsingEncoding:NSUTF8StringEncoding]; [asyncSocket writeData:cmdData withTimeout:-1 tag:0]; } NSLog(@"Error: %@", err); } } - (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port { NSLog(@"onSocket:%p didConnectToHost:%@ port:%hu", sock, host, port); [sock readDataWithTimeout:1 tag:0]; } -(void) onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag { } - (void)onSocket:(AsyncSocket *)sock didSecure:(BOOL)flag { NSLog(@"onSocket:%p didSecure:YES", sock); } - (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err { NSLog(@"onSocket:%p willDisconnectWithError:%@", sock, err); } - (void)onSocketDidDisconnect:(AsyncSocket *)sock { //断开连接了 NSLog(@"onSocketDidDisconnect:%p", sock); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (void)viewDidUnload { asyncSocket=nil; } //打开 - (NSInteger)SocketOpen:(NSString*)addr port:(NSInteger)port { if (![asyncSocket isConnected]) { [asyncSocket connectToHost:addr onPort:port withTimeout:-1 error:nil]; NSLog(@"connect to Host:%@ Port:%d",addr,port); } return 0; }
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