实现扫描 一/二维码 -- ZBar开源SDK

#import "MQMainViewController.h"
#import "ZBarSDK.h"

@interface MQMainViewController ()

@end

@implementation MQMainViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    
    [self addCaptureButton];
    
}


#pragma mark - add btn
- (void)addCaptureButton
{
    CGRect frame = CGRectMake(0, 0, 100, 100);
    UIButton * btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame = frame;
    [btn setTitle:@"拍照" forState:UIControlStateNormal];
    btn.backgroundColor = [UIColor clearColor];
    btn.tag = 1111;
    [btn addTarget:self action:@selector(onClickCaptureButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}



-(IBAction)onClickCaptureButton:(id)sender
{
    [self takePicture];
}

- (void)takePicture
{
    ZBarReaderViewController * reader = [ZBarReaderViewController new];
    reader.readerDelegate = self;
    reader.supportedOrientationsMask = ZBarOrientationMaskAll;
    
    
    reader.wantsFullScreenLayout = NO;  //非全屏
    reader.showsZBarControls = NO;  //隐藏底部控制按钮
    
    
    [self setOverlayPickerView:reader]; //设置自己定义的界面
    
    
    ZBarImageScanner * scanner = reader.scanner;
    [scanner setSymbology:ZBAR_I25 config:ZBAR_CFG_ENABLE to:0];
    
    //reader.showsZBarControls = YES;
    
    [self presentViewController:reader animated:YES completion:nil];
}



- (void)setOverlayPickerView:(ZBarReaderViewController *)reader
{
    
    
    //清除原有控件
    for (UIView * temp in [reader.view subviews])
    {
        for (UIButton *button in [temp subviews])
        {
            if ([button isKindOfClass:[UIButton class]])
            {
                [button removeFromSuperview];
            }
            
        }
        
        for (UIToolbar * toolbar in [temp subviews])
        {
            if ([toolbar isKindOfClass:[UIToolbar class]])
            {
                
                [toolbar setHidden:YES];
                [toolbar removeFromSuperview];
            }
        }
    }
    
    
    
    //画中间的基准线
    UIView * line = [[UIView alloc] initWithFrame:CGRectMake(40, 220, 240, 1)];
    line.backgroundColor = [UIColor redColor];
    [reader.view addSubview:line];
    //[line release];
    
    
    //最上部view
    UIView* upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 80)];
    upView.alpha = 0.3;
    upView.backgroundColor = [UIColor blackColor];
    [reader.view addSubview:upView];
    
    
    //用于说明的label
    UILabel * labIntroudction= [[UILabel alloc] init];
    labIntroudction.backgroundColor = [UIColor clearColor];
    labIntroudction.frame=CGRectMake(15, 20, 290, 50);
    labIntroudction.numberOfLines=2;
    labIntroudction.textColor=[UIColor whiteColor];
    labIntroudction.text=@"将二维码图像置于矩形方框内，离手机摄像头10CM左右，系统会自动识别。";
    [upView addSubview:labIntroudction];
    //[labIntroudction release];
    //[upView release];
    
    
    //左侧的view
    UIView * leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 80, 20, 280)];
    leftView.alpha = 0.3;
    leftView.backgroundColor = [UIColor blackColor];
    [reader.view addSubview:leftView];
    //[leftView release];
    
    
    //右侧的view
    UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(300, 80, 20, 280)];
    rightView.alpha = 0.3;
    rightView.backgroundColor = [UIColor blackColor];
    [reader.view addSubview:rightView];
    //[rightView release];
    
    
    
    //底部view
    UIView * downView = [[UIView alloc] initWithFrame:CGRectMake(0, 360, 320, 220)];
    downView.alpha = 0.3;
    downView.backgroundColor = [UIColor blackColor];
    [reader.view addSubview:downView];
    //[downView release];
    
    
    //用于取消操作的button
    UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    cancelButton.alpha = 0.4;
    [cancelButton setFrame:CGRectMake(20, 390, 280, 40)];
    [cancelButton setTitle:@"取消" forState:UIControlStateNormal];
    [cancelButton.titleLabel setFont:[UIFont boldSystemFontOfSize:20]];
    [cancelButton addTarget:self action:@selector(dismissOverlayView:)forControlEvents:UIControlEventTouchUpInside];
    [reader.view addSubview:cancelButton];
    
}




- (void) imagePickerController:(UIImagePickerController*) reader didFinishPickingMediaWithInfo:(NSDictionary*) info
{
    id<NSFastEnumeration> results = [info objectForKey:ZBarReaderControllerResults];
    ZBarSymbol * symbol;
    for (symbol in results) {
        break;
    }
    
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"解码内容" message:symbol.data delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
    [alertView show];
    
    
    
}



//取消button方法
- (void)dismissOverlayView:(id)sender
{
    [self dismissModalViewControllerAnimated: YES];
}





@end