FlutterPlugins/flutter_barcode_reader
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Code Issues Releases Wiki Activity

Merge pull request #167 from mintware-de/fix_issue_61

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Fix rotation in iOS
This commit is contained in:
Julian Finkler 2020-02-19 21:46:24 +01:00 committed by GitHub
commit 0ef78bb112
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3 changed files with 61 additions and 24 deletions
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10
example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings Normal file
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@ -0,0 +1,10 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>BuildSystemType</key>
<string>Original</string>
<key>PreviewsEnabled</key>
<false/>
</dict>
</plist>

45
ios/Classes/BarcodeScannerViewController.m
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@ -10,6 +10,35 @@
@implementation BarcodeScannerViewController { @implementation BarcodeScannerViewController {
} }
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
CGRect bounds = [UIScreen mainScreen].bounds;
CGRect reversedBounds = CGRectMake(bounds.origin.x, bounds.origin.y, bounds.size.height, bounds.size.width);
self.previewView.bounds = reversedBounds;
self.previewView.frame = reversedBounds;
[self.scanRect stopAnimating];
[self.scanRect removeFromSuperview];
[self setupScanRect:reversedBounds];
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
}
- (void)setupScanRect:(CGRect)bounds {
self.scanRect = [[ScannerOverlay alloc] initWithFrame:bounds];
self.scanRect.translatesAutoresizingMaskIntoConstraints = NO;
self.scanRect.backgroundColor = UIColor.clearColor;
[self.view addSubview:_scanRect];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"V:[scanRect]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:@{@"scanRect": _scanRect}]];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"H:[scanRect]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:@{@"scanRect": _scanRect}]];
[_scanRect startAnimating];
}
- (void)viewDidLoad { - (void)viewDidLoad {
[super viewDidLoad]; [super viewDidLoad];
@ -26,21 +55,7 @@
options:NSLayoutFormatAlignAllBottom options:NSLayoutFormatAlignAllBottom
metrics:nil metrics:nil
views:@{@"previewView": _previewView}]]; views:@{@"previewView": _previewView}]];
self.scanRect = [[ScannerOverlay alloc] initWithFrame:self.view.bounds]; [self setupScanRect:self.view.bounds];
self.scanRect.translatesAutoresizingMaskIntoConstraints = NO;
self.scanRect.backgroundColor = UIColor.clearColor;
[self.view addSubview:_scanRect];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"V:[scanRect]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:@{@"scanRect": _scanRect}]];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"H:[scanRect]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:@{@"scanRect": _scanRect}]];
[_scanRect startAnimating];
self.scanner = [[MTBBarcodeScanner alloc] initWithPreviewView:_previewView]; self.scanner = [[MTBBarcodeScanner alloc] initWithPreviewView:_previewView];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancel)]; self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancel)];
[self updateFlashButton]; [self updateFlashButton];

30
ios/Classes/ScannerOverlay.m
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@ -83,19 +83,31 @@
} }
- (CGRect)scanRect { - (CGRect)scanRect {
CGRect rect = self.frame; CGRect rect = self.frame;
CGFloat heightMultiplier = 3.0/4.0; // 4:3 aspect ratio
CGFloat scanRectWidth = rect.size.width * 0.8f; CGFloat frameWidth = rect.size.width;
CGFloat scanRectHeight = scanRectWidth * heightMultiplier; CGFloat frameHeight = rect.size.height;
CGFloat scanRectOriginX = (rect.size.width / 2) - (scanRectWidth / 2);
CGFloat scanRectOriginY = (rect.size.height / 2) - (scanRectHeight / 2); BOOL isLandscape = frameWidth > frameHeight;
return CGRectMake(scanRectOriginX, scanRectOriginY, scanRectWidth, scanRectHeight); CGFloat widthOnPortrait = isLandscape ? frameHeight : frameWidth;
CGFloat scanRectWidth = widthOnPortrait * 0.8f;
CGFloat aspectRatio = 3.0/4.0;
CGFloat scanRectHeight = scanRectWidth * aspectRatio;
if(isLandscape) {
CGFloat navbarHeight = 32;
frameHeight += navbarHeight;
}
CGFloat scanRectOriginX = (frameWidth - scanRectWidth) / 2;
CGFloat scanRectOriginY = (frameHeight - scanRectHeight) / 2;
return CGRectMake(scanRectOriginX, scanRectOriginY, scanRectWidth, scanRectHeight);
} }
- (CGRect)scanLineRect { - (CGRect)scanLineRect {
CGRect scanRect = [self scanRect]; CGRect scanRect = [self scanRect];
CGRect rect = self.frame; CGFloat positionY = scanRect.origin.y + (scanRect.size.height / 2);
return CGRectMake(scanRect.origin.x, rect.size.height / 2, scanRect.size.width, 1); return CGRectMake(scanRect.origin.x, positionY, scanRect.size.width, 1);
} }
@end @end