我真的需要帮助。我是iOS / Objective-C的新手,很抱歉,如果解决问题很明显,或者我的代码很糟糕。对我来说很容易!! : - )
我正在努力将ZBarSDK整合到我正在构建的iPad应用程序中读取QR码。如果我使用ZBarReaderController(其中有很多关于实现的教程和指南),它可以正常工作。但是我想让相机出现在UIView中而不是全屏相机。
现在我已经按照预期使得摄像机视图(readerView)出现在UIView(ZBarReaderView)中,但是在扫描代码时出现错误。在扫描代码之前不会出现错误,这使我相信这是代理相关或其他内容。
以下是我的代码的重要部分:(在PCH文件中导入ZBarSDK.h)
SignInViewController.h
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@class AVCaptureSession, AVCaptureDevice;
@interface SignInViewController : UIViewController
< ZBarReaderDelegate >
{
ZBarReaderView *readerView;
UITextView *resultText;
}
@property (nonatomic, retain) UIImagePickerController *imgPicker;
@property (strong, nonatomic) IBOutlet UITextView *resultText;
@property (strong, nonatomic) IBOutlet ZBarReaderView *readerView;
-(IBAction)StartScan:(id) sender;
SignInViewController.m
#import "SignInViewController.h"
@interface SignInViewController ()
@end
@implementation SignInViewController
@synthesize resultText, readerView;
-(IBAction)StartScan:(id) sender
{
readerView = [ZBarReaderView new];
readerView.readerDelegate = self;
readerView.tracksSymbols = NO;
readerView.frame = CGRectMake(30,70,230,230);
readerView.torchMode = 0;
readerView.device = [self frontFacingCameraIfAvailable];
ZBarImageScanner *scanner = readerView.scanner;
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
[self relocateReaderPopover:[self interfaceOrientation]];
[readerView start];
[self.view addSubview: readerView];
resultText.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);
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);
resultText.text=symbol.data;
NSLog(@"BARCODE= %@",symbol.data);
NSLog(@"SYMBOL : %@",hiddenData);
resultText.text=hiddenData;
}
扫描代码时出现的错误:
2012-12-16 14:28:32.797 QRTestApp[7970:907] -[SignInViewController readerView:didReadSymbols:fromImage:]: unrecognized selector sent to instance 0x1e88b1c0
2012-12-16 14:28:32.799 QRTestApp[7970:907] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SignInViewController readerView:didReadSymbols:fromImage:]: unrecognized selector sent to instance 0x1e88b1c0'
我不太担心结果会发生什么,只是想克服这个错误。由于严重缺乏关于ZBarReaderView的教程或文档(无论如何对于初学者),我花了很多时间来让相机出现在UIView中。谢谢大家。
答案 0 :(得分:2)
我修好了。有一个不正确的代表名称。应该是&#34; ZbarReaderViewDelegate&#34;。我错过了&#34;视图&#34;部分。 DOH !!
@interface SignInViewController : UIViewController
< ZBarReaderViewDelegate >
{
ZBarReaderView *readerView;
UITextView *resultText;
}