我需要在应用程序中集成二维码阅读器并找到它的教程。
我从这个链接下载了 Z-bar sdk 。
这是我所做的。
在 QRscannerViewController.m
-(IBAction)StartScan:(id) sender
{
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
reader.readerView.torchMode = 0;
ZBarImageScanner *scanner = reader.scanner;
// TODO: (optional) additional reader configuration here
// EXAMPLE: disable rarely used I2/5 to improve performance
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
// present and release the controller
[self presentModalViewController: reader
animated: YES];
[reader release];
resultTextView.hidden=NO;
}
- (void) readerControllerDidFailToRead: (ZBarReaderController*) reader
withRetry: (BOOL) retry{
NSLog(@"the image picker failing to read");
}
- (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
{
NSLog(@"the image picker is calling successfully %@",info);
// ADD: get the decode results
id<NSFastEnumeration> results = [info objectForKey: ZBarReaderControllerResults];
ZBarSymbol *symbol = nil;
NSString *hiddenData;
for(symbol in results)
hiddenData=[NSString stringWithString:symbol.data];
NSLog(@"the symbols is the following %@",symbol.data);
// EXAMPLE: just grab the first barcode
// break;
// EXAMPLE: do something useful with the barcode data
//resultText.text = symbol.data;
resultTextView.text=symbol.data;
NSLog(@"BARCODE= %@",symbol.data);
NSUserDefaults *storeData=[NSUserDefaults standardUserDefaults];
[storeData setObject:hiddenData forKey:@"CONSUMERID"];
NSLog(@"SYMBOL : %@",hiddenData);
resultTextView.text=hiddenData;
[reader dismissModalViewControllerAnimated: NO];
}
添加了所有需要的框架，因此没有referenced from错误。
当我单击扫描按钮时，ZBarReaderViewController 显示良好，我按住 alt 键并单击鼠标左键打开模拟器的照片库，一切正常。
问题是什么，
- QR 图像未被扫描，即
imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo函数未被调用。 - QR 图像看起来比其原始尺寸大。
如何解决这个问题？
为什么图像没有被扫描？