iphone – 如何在iOS6.0及更高版本的ZBar条形码阅读器中隐藏信息

发布时间：2020-12-14 19:57:04 所属栏目：百科来源：网络整理

导读：我在我的iOS应用程序中使用适用于iOS 5.0及更高版本的ZBar条形码阅读器. 我使用Camera Interface上的以下代码隐藏了信息按钮. UIView * infoButton= infoButton = [[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews] objectA

我在我的iOS应用程序中使用适用于iOS 5.0及更高版本的ZBar条形码阅读器.

我使用Camera Interface上的以下代码隐藏了信息按钮.

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

但不知何故,此代码不适用于iOS6.0及更高版本.

解决方法

试试这个代码,这对iOS5.0及以上版本起作用了.

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];

说明.
????在iOS 6.0中,如果您打印日志.

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

输出.

"<_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>>

在iOS 5.0中,[[[[reader.view.subviews objectAtIndex:1] subviews] objectAtIndex:0] subviews]);

输出.

"<_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>>"

因此,对于iOS 6.0及更高版本,它应该是索引3处的对象,因为有一个额外的视图UIImageView.

（编辑：李大同）

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