Question

我有以下代码：

#pragma mark Barcodescanner
- (void)barcodeScanner:(id)sender {

UIWindow *window = [UIApplication sharedApplication].delegate.window;

//UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, window.frame.size.width, window.frame.size.height)];

UIView *view = [[UIView alloc] initWithFrame:CGRectMake((window.frame.size.width - 600) / 2, (window.frame.size.height - 400) / 2, 600, 400)];

//Here it should be checked if the scanner is open, if it is open, the scanner should closed, if the scanner is not open, the scanner should be open
[window addSubview:view];

self.scanner = [[MTBBarcodeScanner alloc] initWithPreviewView:view];


[MTBBarcodeScanner requestCameraPermissionWithSuccess:^(BOOL success) {
    if (success) {

        [self.scanner startScanningWithResultBlock:^(NSArray *codes) {

            [self.scanner stopScanning];

            AVMetadataMachineReadableCodeObject *code = [codes firstObject];

            NSRange rangeTypeOfEngine = NSMakeRange(0, 2);
            NSString *typOfEngine = [code.stringValue substringWithRange:rangeTypeOfEngine];

            NSRange rangeSerialNumberOfEngine = NSMakeRange(2, code.stringValue.length - 2);
            NSString *serialNumberOfEngine = [code.stringValue substringWithRange:rangeSerialNumberOfEngine];

            NSNumberFormatter *f = [[NSNumberFormatter alloc] init];
            f.numberStyle = NSNumberFormatterDecimalStyle;
            NSNumber *myNumber = [f numberFromString:typOfEngine];


            NSString *nameOfEngine;

            switch ([myNumber intValue]) {
                case 10:
                case 11:
                case 12:
                case 13:
                    nameOfEngine = @"T100";
                    break;
                default:
                    nameOfEngine = @"noname";
                    serialNumberOfEngine = @"";
                    break;
            }


            Geraet *newGeraet = [NSEntityDescription insertNewObjectForEntityForName:@"Geraet" inManagedObjectContext:MOC];
            newGeraet.einsatzbericht = self.einsatzbericht;
            newGeraet.bezeichnung = nameOfEngine;
            newGeraet.nummer = serialNumberOfEngine;

            [MOC save:nil];

            [[NSNotificationCenter defaultCenter] postNotificationName:kUpdateListOfDevices object:nil];

            [view removeFromSuperview];


            /*
                NSArray *codeArray = [code.stringValue componentsSeparatedByString:@"\n"];

                [view removeFromSuperview];

                DLAVAlertView *alertView = [[DLAVAlertView alloc] initWithTitle:@"Fehler" message:@"Ungültiger Code" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
                [alertView show];
            */
        }];

    } else {
            [view removeFromSuperview];
    }
}];
}

我添加完整的功能，看它会做什么。

我的问题是，当有人点击camperabutton打开扫描仪时，他扫描任何条形码时都无法取消扫描仪。

Answer 1

相机和警报视图在新窗口中打开，而不是在应用程序窗口中打开。

检查带有视图的窗口是否已打开

1 个答案: