ios-zbar scanview 根据扫描区域切割图片

在scanview中添加扫描区域

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ZBarReaderViewController *reader = [ZBarReaderViewController new];

    reader.readerDelegate = self;

    //CGRect frame= CGRectMake(20, 30, 320, 260);

    reader.scanCrop= CGRectMake(0.2, .1, .47, .8);　　

自定义scanview添加一个自定义的扫描框

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- (UIView *)setOverlayPickerView{

    UIView *v=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

    [v setBackgroundColor:[UIColor clearColor]];

    UILabel *scanningLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 50, 120, 30)];

    [scanningLabel setBackgroundColor:[UIColor clearColor]];

    [scanningLabel setFont:[UIFont fontWithName:@"Courier" size: 18.0]];

    [scanningLabel setTextColor:[UIColor redColor]];

    [scanningLabel setText:@"Scanning..."];

    [scanningLabel setHidden:NO];

    [v addSubview:scanningLabel];

     

    UIImageView *overlayImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"overlaygraphic.png"]];

    [overlayImageView setFrame:CGRectMake(30, 100, 260, 200)];

    [v addSubview:overlayImageView];

    UIToolbar *myToolBar = [[UIToolbar alloc] init];

    UIBarButtonItem *backButton=[[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:self action:@selector(dismissOverlayView:)];

    UISwitch *sw=[[UISwitch alloc] init];

    [sw setOn:NO];

    UIBarButtonItem *switchButton=[[UIBarButtonItem alloc] initWithCustomView:sw];

    UIBarButtonItem *fixed=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

    [sw addTarget:self action:@selector(handleSwitchFlash:) forControlEvents:UIControlEventValueChanged];

    [myToolBar setItems:[NSArray arrayWithObjects:backButton,fixed,switchButton,nil]];

    [myToolBar setBarStyle:UIBarStyleDefault];

    CGRect toolBarFrame;

    toolBarFrame = CGRectMake(0, 436, 320, 44);

    [myToolBar setFrame:toolBarFrame];

    [v addSubview:myToolBar];

    return  v;

}

切割图片

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// EXAMPLE: do something useful with the barcode image

     

    UIImage *largeImage=[info objectForKey: UIImagePickerControllerOriginalImage];

     

    //UIImage * PortraitImage = [[UIImage alloc] initWithCGImage: largeImage.CGImage

    //                                                     scale: 1.0

    //                                               orientation: UIImageOrientationLeft];

    UIImage * PortraitImage=[largeImage imageRotatedByDegrees:90];

     

    //CGRectMake(0.2, .1, .47, .8);

    float w=largeImage.size.width;

    float h=largeImage.size.height;

    NSLog(@"====largeimagesize:h=%f,w=%f",largeImage.size.height,largeImage.size.width);

    NSLog(@"====PortraitImage:h=%f,w=%f",PortraitImage.size.height,PortraitImage.size.width);

    CGImageRef imageRef = CGImageCreateWithImageInRect([PortraitImage CGImage], CGRectMake(w*.25, h*.2, w*.8, h*.27));

     

     

    // or use the UIImage wherever you like

    [self.scanImageView setImage:[UIImage imageWithCGImage:imageRef]];