How to hide info button in ZBar Bar Code Reader for iOS6.0 and above

Question

I am using ZBar Bar Code Reader for iOS 5.0 and above in my iOS App.

I have made info button hidden using following code on Camera Interface.

UIView * infoButton= infoButton = [[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:2];
[infoButton setHidden:YES];

But somehow this code doesn't work for iOS6.0 and Above.

icodebuster · Accepted Answer · 2013-05-07T10:23:52.623

Try this code, this worked for me on iOS5.0 and above.

float currentVersion = 5.1;
float sysVersion = [[[UIDevice currentDevice] systemVersion] floatValue];

UIView * infoButton;
if (sysVersion > currentVersion)
   infoButton = [[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:3];
else
   infoButton = [[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:2];
[infoButton setHidden:YES];

Explanation. In iOS 6.0, If you print the log.

NSLog(@"%@",[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews]);

Output.

"<_UIToolbarBackground: 0xa0991c0; frame = (0 0; 320 54); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0xa0795e0>>",
"<UIImageView: 0xa05d630; frame = (0 -3; 320 3); opaque = NO; autoresize = W+BM; userInteractionEnabled = NO; layer = <CALayer: 0xa05cfb0>>",
"<UIToolbarTextButton: 0xa0a8cc0; frame = (6 0; 60 54); opaque = NO; layer = <CALayer: 0xa0a9460>>",
"<UIButton: 0xa0960e0; frame = (290 18; 18 19); opaque = NO; layer = <CALayer: 0xa0615a0>>

in iOS 5.0, If you print the log.

NSLog(@"%@",[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews]);

Output.

"<_UIToolbarBackground: 0x8d9df90; frame = (0 0; 320 54); userInteractionEnabled = NO; layer = <CALayer: 0x8dc12c0>> - (null)",
"<UIToolbarTextButton: 0x8de5ae0; frame = (6 0; 60 54); opaque = NO; layer = <CALayer: 0x8de5db0>>",
"<UIButton: 0x8d1b110; frame = (290 18; 18 19); opaque = NO; layer = <CALayer: 0x8dba2b0>>"

Hence for iOS 6.0 and above it should be object at index 3 since there is an extra view UIImageView.

Note that on iOS 10 (at least on the beta version) it has changed again. Now the button is at `objectAtIndex:1` (vs. 3 for iOS 9 and below). — Elad, Jul 31 '16 at 12:15
@Elad Thank you for the update will test it and update it shorlty. — icodebuster, Jul 31 '16 at 12:18

score 6 · Answer 2 · answered Sep 18 '13 at 12:15

With the last version of ZBar I solded this problem with another path:

UIView * infoButton = [[[[[reader.view.subviews objectAtIndex:2] subviews] objectAtIndex:0] subviews] objectAtIndex:3];

[infoButton setHidden:YES];

The array keys are changed to [2] [0] [3]

score 3 · Answer 3 · answered May 03 '13 at 07:13

3

Try this code :

UIView * infoButton = [[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:3];

[infoButton setHidden:YES];

answered May 03 '13 at 07:13

Priyank Gandhi

1,257
1
16
29

2

Isn't it the same answer given by icodebuster. you just copy-pasted it. – Prasen May 07 '13 at 19:11

score 3 · Answer 4 · answered Aug 22 '14 at 13:00

Another hack.

I didn't want to rely on only the views and subviews index, very prone to be changed.
So I access the toolbar where the info button is inserted, and remove the appropriate UIBarButtonItem.

Create a subclass of ZBarReaderViewController:

@interface ZBarReaderViewControllerWithoutInfoButton : ZBarReaderViewController

@end

@implementation ZBarReaderViewControllerWithoutInfoButton


- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    // Accessing the toolbar
    UIToolbar *toolbar = [[controls subviews] firstObject];

    // Only keeping the first two items of the toolbar, thus deleting the info button
    if ([toolbar isKindOfClass:UIToolbar.class]) {
        toolbar.items = @[ toolbar.items[0], toolbar.items[1] ];
    }
}

@end

Do not forget to instantiate this new subclass ([ZBarReaderViewControllerWithoutInfoButton new] instead of ``[ZBarReaderViewController new]`) when presenting the scanner view controller.

Before:

Before, with info button

After:

After, without info button

DevonDahon · Answer 5 · 2013-08-06T05:33:15.803

For me, the path to the button was a bit different, so here is my solution :

Get the button :

UIButton *cancelButton = [[[[[reader.view.subviews objectAtIndex:2] subviews] objectAtIndex:0] subviews] objectAtIndex:2] subviews] objectAtIndex:0];

And hide it :

[cancelButton setHidden:YES];

Or do whatever with this button, I needed to translate it :

[cancelButton setTitle:@"キャンセル" forState:UIControlStateNormal];

score 2 · Answer 6 · answered Sep 27 '16 at 13:24

New solutions for new devices, as in iOS10 this Buttons its 2 instead of index3, here is the code with the before solution applied.

float currentVersion = 5.1;
float sysVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
UIView * infoButton;

if (sysVersion > currentVersion && sysVersion < 10 )
   infoButton = [[[[[self.scanReader.view.subviews objectAtIndex:2] subviews] objectAtIndex:0] subviews] objectAtIndex:3];
else
   infoButton = [[[[[self.scanReader.view.subviews objectAtIndex:2] subviews] objectAtIndex:0] subviews] objectAtIndex:1];

[infoButton setHidden:YES];

Hope it helps, regards

score 1 · Answer 7 · answered Apr 08 '14 at 10:35

1

Not excatly what you asked for, but to remove the whole bar at the bottom of the screen you can use

reader.showsZBarControls = NO;

answered Apr 08 '14 at 10:35

hfogel

619
7
13

score 0 · Answer 8 · answered Oct 27 '16 at 17:29

Here is the working code block.

float currentVersion = 5.1;
float sysVersion = [[[UIDevice currentDevice] systemVersion] floatValue];

UIView * infoButton;

if (sysVersion > currentVersion && sysVersion < 10 )
    infoButton = [[[[[codeReader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:3];
else
    infoButton = [[[[[codeReader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectAtIndex:1];

[infoButton setHidden:YES];

How to hide info button in ZBar Bar Code Reader for iOS6.0 and above

8 Answers8

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