我在其他项目中使用过成功使用的ZBar,但是在将其实现到我的最新项目时遇到了问题。它被设置为选项卡式视图应用程序,其中第一个选项卡是扫描仪,第二个选项卡输出结果。为了解决使用全屏而不显示标签栏的ZBar问题,我创建了一个子视图(参见下面的代码)。但是,我也在我的其他ZBar项目上对此进行了测试,当您使用子视图时,ZBar不会读取条形码然后存储编码数据。相反,动画扫描示踪剂只是反弹。
我可以在代码中添加一些内容,以便在子视图中使用ZBar吗?或者这是在标签应用程序中使用ZBar的错误方法吗?
这是我的扫描方法:
- (void) presentReader
{
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationPortrait);
reader.showsHelpOnFail = YES;
NSLog(@"reader presented");
ZBarImageScanner *scanner = reader.scanner;
// TODO: (optional) additional reader configuration here
// EXAMPLE: disable rarely used I2/5 to improve performance
[scanner setSymbology: 0
config: ZBAR_CFG_ENABLE
to: 0];
[scanner setSymbology: ZBAR_UPCA
config: ZBAR_CFG_ENABLE
to: 0];
[scanner setSymbology: ZBAR_DATABAR
config: ZBAR_CFG_ENABLE
to: 1];
[scanner setSymbology: ZBAR_DATABAR_EXP
config: ZBAR_CFG_ENABLE
to: 1];
reader.showsCameraControls = NO; // for UIImagePickerController
reader.showsZBarControls = NO;
//reader.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
reader.wantsFullScreenLayout = NO;
reader.videoQuality = UIImagePickerControllerQualityTypeIFrame1280x720;
//Subview
[self.view addSubview:reader.view];
}
答案 0 :(得分:3)
这适用于UITabBarController - (图片)http://db.tt/cgVxDd0x
我认为您的问题是您没有设置reader.scanCrop。
-(void) viewDidAppear:(BOOL)animated {
self.reader = [ZBarReaderViewController new];
self.reader.readerDelegate = self;
self.reader.enableCache = NO;
self.reader.showsZBarControls = NO;
self.reader.wantsFullScreenLayout = NO;
self.reader.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;
self.reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationPortrait);
ZBarImageScanner *scanner = self.reader.scanner;
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
self.reader.scanCrop = CGRectMake(0, 0, 1, 1);
[self.view addSubview:self.reader.view];
}
- (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info {
id<NSFastEnumeration> results = [info objectForKey: ZBarReaderControllerResults];
ZBarSymbol *symbol = nil;
for(symbol in results)
break;
NSLog(@"%@",symbol.data);
}
答案 1 :(得分:0)
我也遇到过这种问题。但是,一旦我将读者对象变成了全局对象而不是本地对象,那么这种方法就可以了。