IOS 使用 ZbarSDK 二维码扫描

#import "ViewController.h"
@interface ViewController ()
{
    UITextField *resultText;
    ZBarReaderView *readerView;
    ZBarCameraSimulator *cameraSim;
}
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    resultText = [[UITextField alloc] initWithFrame:CGRectMake(20, 40, 200, 60)];
    resultText.backgroundColor = [UIColor blueColor];
    [self.view addSubview:resultText];
    readerView = [[ZBarReaderView alloc]init];
    readerView.frame = CGRectMake(10, 110, 300, 300);
    readerView.readerDelegate = self;
    //关闭闪光灯
    readerView.torchMode = 0;
    //处理模拟器
    if (TARGET_IPHONE_SIMULATOR) {
        ZBarCameraSimulator *cameraSimulator
        = [[ZBarCameraSimulator alloc]initWithViewController:self];
        cameraSimulator.readerView = readerView;
    }
    [self.view addSubview:readerView];
    [readerView start];
}
- (void) readerView: (ZBarReaderView*) view
     didReadSymbols: (ZBarSymbolSet*) syms
          fromImage: (UIImage*) img
{
    // do something useful with results
    for(ZBarSymbol *sym in syms) {
        resultText.text = sym.data;
        break;
    }
    [readerView stop];
}