UITableViewWrapperView is not present in iOS11, When I build my App using Xcode9.
I am setting background view for my UITableView by using insertSubview method of UIView, that code is working fine with all iOS versions when I compiled my code using Xcode8 but when I build same code using Xcode9 then content is invisible(on iOS 11) because background layer coming over cells.
Below is debug results -
Xcode9 and iOS 11 -
A. Before Adding background
▿ 2 elements - 1 : <UIImageView: 0x7fe7f5f045c0; frame = (3 710.667; 408 2.33333); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x604000223f80>> - 2 : <UIImageView: 0x7fe7f5f01e30; frame = (408.667 3; 2.33333 385); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled> = NO; layer = <CALayer: 0x604000226720>>B. After Adding background
▿ 3 elements - 0 : <UIView: 0x7fe7f5e09840; frame = (0 0; 414 736); layer = <CALayer: 0x60400003d780>> - 1 : <UIImageView: 0x7fe7f5f045c0; frame = (3 710.667; 408 2.33333); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x604000223f80>> - 2 : <UIImageView: 0x7fe7f5f01e30; frame = (408.667 3; 2.33333 385); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled> = NO; layer = <CALayer: 0x604000226720>>Xcode8 and iOS 11 - UITableViewWrapperView is present -
A. Before Adding background
3 elements - 0 : <UITableViewWrapperView: 0x7ffdbe81cc00; frame = (0 0; 375 647); gestureRecognizers = <NSArray: 0x608000244a10>; layer => <CALayer: 0x608000028cc0>;contentOffset: {0, 0}; contentSize: {375,> 647}> - 1 : <UIImageView: 0x7ffdbe406af0; frame = (3 641.5; 369 2.5); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO;layer = <CALayer: 0x608000028fe0>> - 2 : <UIImageView: 0x7ffdbe407320; frame = (369.5 637; 2.5 7); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO;> layer = <CALayer: 0x608000029140>>B. After Adding background
4 elements - 0 : <UIView: 0x7ffdbe505cc0; frame = (0 0; 375 667); layer = <CALayer: 0x60000002a460>> - 1 : <UITableViewWrapperView: 0x7ffdbe81cc00; frame = (0 0; 375 647); gestureRecognizers = <NSArray: 0x608000244a10>; layer =<CALayer: 0x608000028cc0>; contentOffset: {0, 0};contentSize: {375,647}> - 2 : <UIImageView: 0x7ffdbe40b0f0; frame = (3 641.5; 369 2.5); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO;layer = <CALayer: 0x608000029e00>> - 3 : <UIImageView: 0x7ffdbe40b550; frame = (369.5 637; 2.5 7); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO;layer = <CALayer: 0x608000029f00>>
Method to set background -
private func setTableViewBackground() { let backgroundView = UIView() backgroundView.frame = view.frame let maskPath: UIBezierPath = UIBezierPath(roundedRect: backgroundView.bounds, byRoundingCorners: ([.topLeft, .topRight]), cornerRadii: CGSize(width:20, height:20)) let maskLayer: CAShapeLayer = CAShapeLayer() maskLayer.frame = backgroundView.bounds maskLayer.path = maskPath.cgPath backgroundView.layer.mask = maskLayer backgroundView.backgroundColor = UIColor.red myCustomTableView.insertSubview(backgroundView, at: 0) } Build using Xcode8 on iOS11
Build using Xcode9 on iOS11
I found this link, which confirms that UITableViewWrapperView is removed from iOS11, but just when we compile code using Xcode9?
4 Answers
Answers 1
That's why I don't like to use undocumented features. Apple guys change them as they want without notifications. My suggestion for your case is to put table view on a red substrate in IB and apply your code.
NB. Don't forget to set clipsToBounds property to true.
The function will be even shorter:
private func setTableViewBackground() { let backgroundView = self.tableViewSubstrate! let maskPath: UIBezierPath = UIBezierPath(roundedRect: backgroundView.bounds, byRoundingCorners: ([.topLeft, .topRight]), cornerRadii: CGSize(width:20, height:20)) let maskLayer: CAShapeLayer = CAShapeLayer() maskLayer.path = maskPath.cgPath backgroundView.layer.mask = maskLayer } You can find sample project here: https://github.com/AlexeyGolovenkov/TableWithRoundCorners
Answers 2
Check your target build settings. You might be building to latest OS and switching from XCode 8 to 9 moved your compile target OS from 10 to 11. This may also be a differentiation between any debug versus release builds. You can change your target in XCode 9 to iOS 10 and it will recompile with the issues fixed, but you risk deprecation problems in the future.
Answers 3
Just try to replace myCustomTableView.insertSubview(backgroundView, at: 0) with
myCustomTableView.backgroundView = backgroundView
It's working fine for me.
Answers 4
bro i think this below line of code may useful to you.
old code :
private func setTableViewBackground() { let backgroundView = UIView() backgroundView.frame = view.frame let maskPath: UIBezierPath = UIBezierPath(roundedRect: backgroundView.bounds, byRoundingCorners: ([.topLeft, .topRight]), cornerRadii: CGSize(width:20, height:20)) let maskLayer: CAShapeLayer = CAShapeLayer() maskLayer.frame = backgroundView.bounds maskLayer.path = maskPath.cgPath backgroundView.layer.mask = maskLayer backgroundView.backgroundColor = UIColor.red myCustomTableView.insertSubview(backgroundView, at: 0) } Replace with below code :
private func setTableViewBackground() { let backgroundView = UIView() backgroundView.frame = view.frame let maskPath: UIBezierPath = UIBezierPath(roundedRect: backgroundView.bounds, byRoundingCorners: ([.topLeft, .topRight]), cornerRadii: CGSize(width:20, height:20)) let maskLayer: CAShapeLayer = CAShapeLayer() maskLayer.frame = backgroundView.bounds maskLayer.path = maskPath.cgPath backgroundView.layer.mask = maskLayer backgroundView.backgroundColor = UIColor.red // myCustomTableView.insertSubview(backgroundView, at: 0) myCustomTableView.backgroundView = backgroundView } 
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