ios 在 UIBarButtonItem 上以编程方式设置可访问性标识符
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Setting accessibility identifier programmatically on UIBarButtonItem
提问by Chris
The accessibility identifier is a developer generated ID for GUI objects, which can be used for automation tests.
可访问性标识符是开发人员为 GUI 对象生成的 ID，可用于自动化测试。
A UIBarButtonItemdoes not implement UIAccessibilityIdentification. However is there a possibility that I can assign an accessibility identifier?
AUIBarButtonItem没有实现UIAccessibilityIdentification。但是，我可以分配可访问性标识符吗？
采纳答案by Don Miguel
You could subclass UIBarButtonItemand implement the UIAccessibilityIdentificationprotocol in that subclass, lets's say BarButtonWithAccesibility.
您可以子类化UIBarButtonItem并UIAccessibilityIdentification在该子类中实现协议，例如BarButtonWithAccesibility.
In BarButtonWithAccesibility.h:
在BarButtonWithAccesibility.h：
@interface BarButtonWithAccesibility : UIBarButtonItem<UIAccessibilityIdentification>
@property(nonatomic, copy) NSString *accessibilityIdentifier NS_AVAILABLE_IOS(5_0);
The only (strict) requirement for adhering to this protocol is defining the accessibilityIdentifierproperty.
遵守此协议的唯一（严格）要求是定义accessibilityIdentifier属性。
Now in your view controller, let's say in viewDidLoad, you could set up a UIToolbar and add your subclassed UIBarButtonItem:
现在在你的视图控制器中，假设viewDidLoad你可以设置一个 UIToolbar 并添加你的子类 UIBarButtonItem：
#import "BarButtonWithAccesibility.h"
- (void)viewDidLoad{
[super viewDidLoad];
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
BarButtonWithAccesibility *myBarButton = [[BarButtonWithAccesibility alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(buttonPressed:)];
myBarButton.accessibilityIdentifier = @"I am a test button!";
toolbar.items = [[NSArray alloc] initWithObjects:myBarButton, nil];
[self.view addSubview:toolbar];
}
And within the buttonPressed:you could verify that you have access to the accessibilityIdentifier:
buttonPressed:您可以在其中验证您是否有权访问accessibilityIdentifier：
- (void)buttonPressed:(id)sender{
if ([sender isKindOfClass:[BarButtonWithAccesibility class]]) {
BarButtonWithAccesibility *theButton = (BarButtonWithAccesibility *)sender;
NSLog(@"My accesibility identifier is: %@", theButton.accessibilityIdentifier);
}
}
Hope this helps.
希望这可以帮助。
回答by Stas Zhukovskiy
As of iOS 5 you can do it like this:
从 iOS 5 开始，您可以这样做：
UIBarButtonItem *btn = [[UIBarButtonItem alloc] init...;
btn.accessibilityLabel = @"Label";
回答by Hussain Shabbir
If you have UIToolbarcreated inside that if you want to create multiple UIBarButtonItemprogramatically then it can be accessed like that and set accessibilityLabelas well like that below:-
如果你已经UIToolbar在里面创建，如果你想以UIBarButtonItem编程方式创建多个，那么它可以accessibilityLabel像下面那样访问和设置：-
-(void)viewDidAppear:(BOOL)animated
{
UIBarButtonItem *infoButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"info" style:UIBarButtonItemStyleBordered target:self action:@selector(infoButtonClicked)];
[self.customToolBar setItems:[NSArray arrayWithObject:infoButtonItem]];
//Here if you have muliple you can loop through it
UIView *view = (UIView*)[self.customToolBar.items objectAtIndex:0];
[view setAccessibilityLabel:NSLocalizedString(@"Test", @"")];
}
回答by Ben Boral
The subclassing UIBarButtonItemis a good solution. Depending on your needs, though, it may make more sense to simply assign the accessibilityIdentifierto the custom image of your UIBarButtonItem, assuming your UIBarButtonItemuses a custom image.
子类化UIBarButtonItem是一个很好的解决方案。但是，根据您的需要，假设您使用自定义图像，简单地将 分配accessibilityIdentifier给 的自定义图像可能更有意义。UIBarButtonItemUIBarButtonItem
