iOS实现连接打印机，打印一段字符串

问答小助手 2013-01-04 01:55:57

加精

问题描述：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。

具体情况是这样的，现在想要用wifi连接到打印机，然后给打印机发送一个字符串去打印。但是问题是不知道如何连接打印机，也不知道如何给打印机发送消息。其中打印机和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。

更多解决方法见：http://ask.csdn.net/questions/910

.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;

}