掃描二維碼控制項的封裝，控制項封裝

掃描二維碼控制項的封裝，控制項封裝

掃描二維碼控制項的封裝

 

效果

 

源碼

https://github.com/YouXianMing/Animations

////  QRCodeView.h//  QRCode////  Created by YouXianMing on 16/7/7.//  Copyright © 2016年 XianMing You. All rights reserved.//#import <UIKit/UIKit.h>#import <AVFoundation/AVFoundation.h>@class QRCodeView;@protocol QRCodeViewDelegate <NSObject>@optional/** *  擷取QR的掃描結果 * *  @param codeView   QRCodeView實體物件 *  @param codeString 掃描字串 */- (void)QRCodeView:(QRCodeView *)codeView codeString:(NSString *)codeString;@end@interface QRCodeView : UIView/** *  代理 */@property (nonatomic, weak) id <QRCodeViewDelegate> delegate;/** *  燈的狀態,預設為關閉 */@property (nonatomic) AVCaptureTorchMode torchMode;/** *  敏感地區,如果不設定,則為全部掃描地區 */@property (nonatomic) CGRect interestArea;/** *  你用來添加自訂控制項的view,尺寸與當前初始化的view一致 */@property (nonatomic, strong) UIView *contentView;/** *  正在運行當中 */@property (nonatomic, readonly) BOOL  isRunning;/** *  開始掃描 * *  @return 如果成功,則返回YES,否則返回NO */- (BOOL)start;/** *  結束掃描 */- (void)stop;@end

////  QRCodeView.m//  QRCode////  Created by YouXianMing on 16/7/7.//  Copyright © 2016年 XianMing You. All rights reserved.//#import "QRCodeView.h"@interface QRCodeView () <AVCaptureMetadataOutputObjectsDelegate>@property (nonatomic) BOOL                                 isRunning;@property (nonatomic, strong) UIView                      *videoView;@property (nonatomic, strong) AVCaptureDeviceInput        *deviceInput;@property (nonatomic, strong) AVCaptureDevice             *captureDevice;@property (nonatomic, strong) AVCaptureSession            *captureSession;@property (nonatomic, strong) AVCaptureVideoPreviewLayer  *videoPreviewLayer;@property (nonatomic, strong) AVCaptureMetadataOutput     *captureMetadataOutput;@end@implementation QRCodeView- (instancetype)initWithFrame:(CGRect)frame {        if (self = [super initWithFrame:frame]) {                self.videoView = [[UIView alloc] initWithFrame:self.bounds];        [self addSubview:self.videoView];                self.contentView = [[UIView alloc] initWithFrame:self.bounds];        [self addSubview:self.contentView];                self.captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];                _torchMode = AVCaptureTorchModeOff;                [self addNotificationCenter];    }        return self;}#pragma mark - NSNotificationCenter related.- (void)addNotificationCenter {        [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(notificationCenterEvent:)                                                 name:AVCaptureInputPortFormatDescriptionDidChangeNotification                                               object:nil];}- (void)removeNotificationCenter {        [[NSNotificationCenter defaultCenter] removeObserver:self                                                    name:AVCaptureInputPortFormatDescriptionDidChangeNotification                                                  object:nil];}- (void)notificationCenterEvent:(NSNotification *)sender {        if (self.interestArea.size.width && self.interestArea.size.height) {                self.captureMetadataOutput.rectOfInterest = [self.videoPreviewLayer metadataOutputRectOfInterestForRect:self.interestArea];            } else {                self.captureMetadataOutput.rectOfInterest = CGRectMake(0, 0, 1, 1);    }}#pragma mark - Start & Stop.- (BOOL)start {        // 初始化輸入資料流    BOOL     result  = NO;    NSError *error   = nil;    self.deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:self.captureDevice error:&error];    if (self.deviceInput == nil) {                NSLog(@"%@", error);        return result;    }        // 建立會話    self.captureSession = [[AVCaptureSession alloc] init];        // 添加輸入資料流    [self.captureSession addInput:self.deviceInput];        // 初始化輸出資料流    self.captureMetadataOutput = [[AVCaptureMetadataOutput alloc] init];        // 添加輸出資料流    [self.captureSession addOutput:self.captureMetadataOutput];        // 建立queue.    [self.captureMetadataOutput setMetadataObjectsDelegate:self queue:dispatch_queue_create(nil, nil)];    self.captureMetadataOutput.metadataObjectTypes = @[AVMetadataObjectTypeQRCode];        // 建立輸出對象    self.videoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession];    self.videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;    self.videoPreviewLayer.frame = self.contentView.bounds;    [self.videoView.layer addSublayer:self.videoPreviewLayer];        // 開始    [self.captureSession startRunning];    self.isRunning = YES;    result         = YES;        return result;}- (void)stop {        [self.captureSession stopRunning];    self.isRunning      = NO;    self.captureSession = nil;}#pragma mark - AVCaptureMetadataOutputObjectsDelegate- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects       fromConnection:(AVCaptureConnection *)connection {        if (metadataObjects.count > 0) {                AVMetadataMachineReadableCodeObject *metadata = metadataObjects.firstObject;        NSString                            *result   = nil;                if ([metadata.type isEqualToString:AVMetadataObjectTypeQRCode]) {                        result = metadata.stringValue;                        if (_delegate && [_delegate respondsToSelector:@selector(QRCodeView:codeString:)]) {                                [_delegate QRCodeView:self codeString:result];            }        }    }}#pragma mark - Setter & Getter.- (void)setTorchMode:(AVCaptureTorchMode)torchMode {    _torchMode = torchMode;        if (_deviceInput && [self.captureDevice hasTorch]) {                [self.captureDevice lockForConfiguration:nil];        [self.captureDevice setTorchMode:torchMode];        [self.captureDevice unlockForConfiguration];    }}#pragma mark - System method.- (void)dealloc {        [self stop];    [self removeNotificationCenter];}@end