最近在做一個(gè)關(guān)于二維碼的組件，已發(fā)布，現(xiàn)總結(jié)下。開(kāi)發(fā)的APP所需支持的最低版本為7.0，最初的方案為掃描使用蘋(píng)果自帶的API實(shí)現(xiàn)掃一掃的功能、使用ZXing識(shí)別從相冊(cè)或別人轉(zhuǎn)發(fā)的二維碼圖片。但發(fā)現(xiàn)ZXing識(shí)別從相冊(cè)中來(lái)的圖片性能很差，很多圖片識(shí)別不了，且耗時(shí)較長(zhǎng)，遂使用ZBar來(lái)實(shí)現(xiàn)識(shí)別從相冊(cè)或別人轉(zhuǎn)發(fā)的二維碼圖片。

掃描：

    AVCaptureDevice* inputDevice =    [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];    [inputDevice lockForConfiguration:nil];    if ([inputDevice hasTorch])    {        inputDevice.torchMode = AVCaptureTorchModeAuto;    }    [inputDevice unlockForConfiguration];    AVCaptureDeviceInput *captureInput =    [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:nil];    if (!captureInput) {        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)        {            UIAlertController *alterVC = [UIAlertController alertControllerWithTitle:@"系統(tǒng)提示" message:@"您已關(guān)閉相機(jī)使用權(quán)限，請(qǐng)至手機(jī)“設(shè)置->隱私->相機(jī)”中打開(kāi)" preferredStyle:UIAlertControllerStyleAlert];            UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:nil];            [alterVC addAction:confirmAction];            [self presentViewController:alterVC animated:YES completion:nil];        }        else        {            UIAlertController *alterVC = [UIAlertController alertControllerWithTitle:@"系統(tǒng)提示" message:@"未能找到相機(jī)設(shè)備" preferredStyle:UIAlertControllerStyleAlert];            UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:nil];            [alterVC addAction:confirmAction];            [self presentViewController:alterVC animated:YES completion:nil];        }        return;    }    AVCaptureMetadataOutput *captureOutput = [[AVCaptureMetadataOutput alloc] init];    [captureOutput setMetadataObjectsDelegate:self queue:_queue];    self.captureOutput = captureOutput;    self.captureSession = [[AVCaptureSession alloc] init];    [self.captureSession addInput:captureInput];    [self.captureSession addOutput:captureOutput];    CGFloat w = 1920.f;    CGFloat h = 1080.f;    if ([self.captureSession canSetSessionPreset:AVCaptureSessionPreset1920x1080]) {        self.captureSession.sessionPreset = AVCaptureSessionPreset1920x1080;    } else
 1/6    1 2 3 4 5 6 下一頁(yè) 尾頁(yè)