iOS NFC

 

 

#import <corenfc/corenfc.h>


@interface viewcontroller ()<nfcndefreadersessiondelegate>

@property (nonatomic,retain) uibutton *begintestbtn;

@property (nonatomic,retain) uilabel *textlabel;


@end

@implementation viewcontroller

- (void)viewdidload {
    [super viewdidload];
    
    _begintestbtn = [[uibutton alloc]initwithframe:cgrectmake(100, 100, 100, 50)];
    [_begintestbtn settitle:@"开始读取" forstate:uicontrolstatenormal];
    [_begintestbtn settitlecolor:[uicolor bluecolor] forstate:uicontrolstatenormal];
    _begintestbtn.titlelabel.textalignment = nstextalignmentleft;
    [_begintestbtn addtarget:self action:@selector(begintestbtnaction) forcontrolevents:uicontroleventtouchupinside];
    
    
    _textlabel = [[uilabel alloc]initwithframe:cgrectmake(120, 180, 200, 50)];
    _textlabel.text = @"待读取";
    _textlabel.textcolor = [uicolor orangecolor];
    [self.view addsubview:_textlabel];
    
    nslog(@"进入vc");
    
    [self.view addsubview:_begintestbtn];
    [self.view addsubview:_textlabel];
    
    
    // do any additional setup after loading the view, typically from a nib.
}


-(void)begintestbtnaction
{
    
    /**
     三个参数
     第一个参数：代理对象
     第二个参数：线程
     第三个参数：session读取一个还是多个ndef。yes：读取一个结束，no：读取多个
     */
    
    nfcndefreadersession *session = [[nfcndefreadersession alloc] initwithdelegate:self queue:dispatch_queue_create(null, dispatch_queue_concurrent) invalidateafterfirstread:yes];
    
    [session beginsession];
    
}


/**
 代理
 */
- (void) readersession:(nonnull nfcndefreadersession *)session diddetectndefs:(nonnull nsarray<nfcndefmessage *> *)messages {
    
    __weak typeof(self) weakself=self;
    dispatch_async(dispatch_get_main_queue(), ^{
        weakself.textlabel.text = @"读取成功";
    });
    
    for (nfcndefmessage *message in messages) {
        for (nfcndefpayload *payload in message.records) {
            nslog(@"payload data:%@",payload.payload);
        }
    }
}

- (void)readersession:(nfcndefreadersession *)session didinvalidatewitherror:(nserror *)error{
    
     nslog(@"error:%@",error);
    
    __weak typeof(self) weakself=self;
    dispatch_async(dispatch_get_main_queue(), ^{
        weakself.textlabel.text = @"读取失败";
    });
    
    
}