330 lines
12 KiB
Objective-C
330 lines
12 KiB
Objective-C
/*
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* QRCodeReaderViewController
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*
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* Copyright 2014-present Yannick Loriot.
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* http://yannickloriot.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#import "QRCodeReaderViewController.h"
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#import "QRCameraSwitchButton.h"
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#import "QRCodeReaderView.h"
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#import "QRToggleTorchButton.h"
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@interface QRCodeReaderViewController ()
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@property (strong, nonatomic) QRCameraSwitchButton *switchCameraButton;
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@property (strong, nonatomic) QRToggleTorchButton *toggleTorchButton;
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@property (strong, nonatomic) QRCodeReaderView *cameraView;
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@property (strong, nonatomic) UIButton *cancelButton;
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@property (strong, nonatomic) QRCodeReader *codeReader;
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@property (assign, nonatomic) BOOL startScanningAtLoad;
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@property (assign, nonatomic) BOOL showSwitchCameraButton;
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@property (assign, nonatomic) BOOL showTorchButton;
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@property (copy, nonatomic) void (^completionBlock) (NSString * __nullable);
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@end
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@implementation QRCodeReaderViewController
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- (void)dealloc
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{
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[self stopScanning];
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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- (id)init
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{
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return [self initWithCancelButtonTitle:nil];
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}
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- (id)initWithCancelButtonTitle:(NSString *)cancelTitle
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{
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return [self initWithCancelButtonTitle:cancelTitle metadataObjectTypes:@[AVMetadataObjectTypeQRCode]];
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}
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- (id)initWithMetadataObjectTypes:(NSArray *)metadataObjectTypes
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{
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return [self initWithCancelButtonTitle:nil metadataObjectTypes:metadataObjectTypes];
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}
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- (id)initWithCancelButtonTitle:(NSString *)cancelTitle metadataObjectTypes:(NSArray *)metadataObjectTypes
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{
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QRCodeReader *reader = [QRCodeReader readerWithMetadataObjectTypes:metadataObjectTypes];
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return [self initWithCancelButtonTitle:cancelTitle codeReader:reader];
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}
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- (id)initWithCancelButtonTitle:(NSString *)cancelTitle codeReader:(QRCodeReader *)codeReader
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{
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return [self initWithCancelButtonTitle:cancelTitle codeReader:codeReader startScanningAtLoad:true];
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}
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- (id)initWithCancelButtonTitle:(NSString *)cancelTitle codeReader:(QRCodeReader *)codeReader startScanningAtLoad:(BOOL)startScanningAtLoad
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{
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return [self initWithCancelButtonTitle:cancelTitle codeReader:codeReader startScanningAtLoad:startScanningAtLoad showSwitchCameraButton:YES showTorchButton:NO];
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}
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- (id)initWithCancelButtonTitle:(nullable NSString *)cancelTitle codeReader:(nonnull QRCodeReader *)codeReader startScanningAtLoad:(BOOL)startScanningAtLoad showSwitchCameraButton:(BOOL)showSwitchCameraButton showTorchButton:(BOOL)showTorchButton
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{
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if ((self = [super init])) {
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self.view.backgroundColor = [UIColor blackColor];
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self.codeReader = codeReader;
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self.startScanningAtLoad = startScanningAtLoad;
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self.showSwitchCameraButton = showSwitchCameraButton;
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self.showTorchButton = showTorchButton;
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if (cancelTitle == nil) {
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cancelTitle = NSLocalizedString(@"Cancel", @"Cancel");
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}
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[self setupUIComponentsWithCancelButtonTitle:cancelTitle];
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[self setupAutoLayoutConstraints];
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[_cameraView.layer insertSublayer:_codeReader.previewLayer atIndex:0];
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
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__weak __typeof__(self) weakSelf = self;
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[codeReader setCompletionWithBlock:^(NSString *resultAsString) {
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if (weakSelf.completionBlock != nil) {
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weakSelf.completionBlock(resultAsString);
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}
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if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(reader:didScanResult:)]) {
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[weakSelf.delegate reader:weakSelf didScanResult:resultAsString];
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}
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}];
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}
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return self;
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}
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+ (instancetype)readerWithCancelButtonTitle:(NSString *)cancelTitle
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{
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return [[self alloc] initWithCancelButtonTitle:cancelTitle];
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}
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+ (instancetype)readerWithMetadataObjectTypes:(NSArray *)metadataObjectTypes
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{
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return [[self alloc] initWithMetadataObjectTypes:metadataObjectTypes];
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}
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+ (instancetype)readerWithCancelButtonTitle:(NSString *)cancelTitle metadataObjectTypes:(NSArray *)metadataObjectTypes
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{
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return [[self alloc] initWithCancelButtonTitle:cancelTitle metadataObjectTypes:metadataObjectTypes];
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}
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+ (instancetype)readerWithCancelButtonTitle:(NSString *)cancelTitle codeReader:(QRCodeReader *)codeReader
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{
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return [[self alloc] initWithCancelButtonTitle:cancelTitle codeReader:codeReader];
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}
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+ (instancetype)readerWithCancelButtonTitle:(NSString *)cancelTitle codeReader:(QRCodeReader *)codeReader startScanningAtLoad:(BOOL)startScanningAtLoad
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{
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return [[self alloc] initWithCancelButtonTitle:cancelTitle codeReader:codeReader startScanningAtLoad:startScanningAtLoad];
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}
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+ (instancetype)readerWithCancelButtonTitle:(NSString *)cancelTitle codeReader:(QRCodeReader *)codeReader startScanningAtLoad:(BOOL)startScanningAtLoad showSwitchCameraButton:(BOOL)showSwitchCameraButton showTorchButton:(BOOL)showTorchButton
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{
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return [[self alloc] initWithCancelButtonTitle:cancelTitle codeReader:codeReader startScanningAtLoad:startScanningAtLoad showSwitchCameraButton:showSwitchCameraButton showTorchButton:showTorchButton];
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}
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- (void)viewWillAppear:(BOOL)animated
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{
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[super viewWillAppear:animated];
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if (_startScanningAtLoad) {
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[self startScanning];
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}
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}
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- (void)viewWillDisappear:(BOOL)animated
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{
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[self stopScanning];
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[super viewWillDisappear:animated];
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}
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- (void)viewWillLayoutSubviews
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{
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[super viewWillLayoutSubviews];
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_codeReader.previewLayer.frame = self.view.bounds;
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}
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- (BOOL)shouldAutorotate
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{
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return YES;
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}
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#pragma mark - Controlling the Reader
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- (void)startScanning {
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[_codeReader startScanning];
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}
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- (void)stopScanning {
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[_codeReader stopScanning];
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}
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#pragma mark - Managing the Orientation
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- (void)orientationChanged:(NSNotification *)notification
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{
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[_cameraView setNeedsDisplay];
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if (_codeReader.previewLayer.connection.isVideoOrientationSupported) {
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UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
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_codeReader.previewLayer.connection.videoOrientation = [QRCodeReader videoOrientationFromInterfaceOrientation:
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orientation];
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}
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}
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#pragma mark - Managing the Block
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- (void)setCompletionWithBlock:(void (^) (NSString *resultAsString))completionBlock
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{
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self.completionBlock = completionBlock;
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}
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#pragma mark - Initializing the AV Components
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- (void)setupUIComponentsWithCancelButtonTitle:(NSString *)cancelButtonTitle
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{
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self.cameraView = [[QRCodeReaderView alloc] init];
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_cameraView.translatesAutoresizingMaskIntoConstraints = NO;
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_cameraView.clipsToBounds = YES;
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[self.view addSubview:_cameraView];
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[_codeReader.previewLayer setFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
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if ([_codeReader.previewLayer.connection isVideoOrientationSupported]) {
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UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
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_codeReader.previewLayer.connection.videoOrientation = [QRCodeReader videoOrientationFromInterfaceOrientation:orientation];
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}
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if (_showSwitchCameraButton && [_codeReader hasFrontDevice]) {
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_switchCameraButton = [[QRCameraSwitchButton alloc] init];
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[_switchCameraButton setTranslatesAutoresizingMaskIntoConstraints:false];
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[_switchCameraButton addTarget:self action:@selector(switchCameraAction:) forControlEvents:UIControlEventTouchUpInside];
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[self.view addSubview:_switchCameraButton];
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}
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if (_showTorchButton && [_codeReader isTorchAvailable]) {
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_toggleTorchButton = [[QRToggleTorchButton alloc] init];
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[_toggleTorchButton setTranslatesAutoresizingMaskIntoConstraints:false];
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[_toggleTorchButton addTarget:self action:@selector(toggleTorchAction:) forControlEvents:UIControlEventTouchUpInside];
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[self.view addSubview:_toggleTorchButton];
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}
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self.cancelButton = [[UIButton alloc] init];
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_cancelButton.translatesAutoresizingMaskIntoConstraints = NO;
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[_cancelButton setTitle:cancelButtonTitle forState:UIControlStateNormal];
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[_cancelButton setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];
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[_cancelButton addTarget:self action:@selector(cancelAction:) forControlEvents:UIControlEventTouchUpInside];
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[self.view addSubview:_cancelButton];
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}
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- (void)setupAutoLayoutConstraints
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{
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NSLayoutYAxisAnchor * topLayoutAnchor;
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NSLayoutYAxisAnchor * bottomLayoutAnchor;
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NSLayoutXAxisAnchor * leftLayoutAnchor;
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NSLayoutXAxisAnchor * rightLayoutAnchor;
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if (@available(iOS 11.0, *)) {
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topLayoutAnchor = self.view.safeAreaLayoutGuide.topAnchor;
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bottomLayoutAnchor = self.view.safeAreaLayoutGuide.bottomAnchor;
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leftLayoutAnchor = self.view.safeAreaLayoutGuide.leftAnchor;
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rightLayoutAnchor = self.view.safeAreaLayoutGuide.rightAnchor;
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} else {
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topLayoutAnchor = self.topLayoutGuide.topAnchor;
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bottomLayoutAnchor = self.bottomLayoutGuide.bottomAnchor;
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leftLayoutAnchor = self.view.leftAnchor;
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rightLayoutAnchor = self.view.rightAnchor;
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}
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NSDictionary *views = NSDictionaryOfVariableBindings(_cameraView, _cancelButton);
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[self.view addConstraints:
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[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_cameraView][_cancelButton(40)]" options:0 metrics:nil views:views]];
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[[bottomLayoutAnchor constraintEqualToAnchor:_cancelButton.bottomAnchor] setActive:YES];
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[self.view addConstraints:
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[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_cameraView]|" options:0 metrics:nil views:views]];
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[self.view addConstraints:
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[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_cancelButton]-|" options:0 metrics:nil views:views]];
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if (_switchCameraButton) {
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[NSLayoutConstraint activateConstraints:@[
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[topLayoutAnchor constraintEqualToAnchor:_switchCameraButton.topAnchor],
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[rightLayoutAnchor constraintEqualToAnchor:_switchCameraButton.rightAnchor],
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[_switchCameraButton.heightAnchor constraintEqualToConstant:50],
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[_switchCameraButton.widthAnchor constraintEqualToConstant:70]
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]];
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}
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if (_toggleTorchButton) {
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[NSLayoutConstraint activateConstraints:@[
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[topLayoutAnchor constraintEqualToAnchor:_toggleTorchButton.topAnchor],
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[leftLayoutAnchor constraintEqualToAnchor:_toggleTorchButton.leftAnchor],
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[_toggleTorchButton.heightAnchor constraintEqualToConstant:50],
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[_toggleTorchButton.widthAnchor constraintEqualToConstant:70]
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]];
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}
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}
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- (void)switchDeviceInput
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{
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[_codeReader switchDeviceInput];
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}
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#pragma mark - Catching Button Events
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- (void)cancelAction:(UIButton *)button
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{
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[_codeReader stopScanning];
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if (_completionBlock) {
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_completionBlock(nil);
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}
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if (_delegate && [_delegate respondsToSelector:@selector(readerDidCancel:)]) {
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[_delegate readerDidCancel:self];
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}
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}
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- (void)switchCameraAction:(UIButton *)button
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{
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[self switchDeviceInput];
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}
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- (void)toggleTorchAction:(UIButton *)button
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{
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[_codeReader toggleTorch];
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}
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@end
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