使用VoiceOver更改已读项目的顺序

Question

我在屏幕上有一堆按钮,这些按钮直观地定位,但不是由VoiceOver按直观顺序读取的.这是因为某些按钮(如向上和向下)位于彼此的上方和下方.然而,画外音似乎开始从左到右,从上到下阅读.

这导致画外音在"向上"之后读取"向上"右侧的按钮,而不是在之后立即读取"向下".

如何强制画外音读取我想要阅读的按钮？我应该提一下,我正在使用画外音上的滑动到循环元素功能.

我的所有按钮都是UIView和UIButton的子类.这是我使用的按钮启动器的示例.忽略像素数 - 我知道这是糟糕的形式,但我现在处于紧张状态:

UIButton* createSpecialButton(CGRect frame, 
                                 NSString* imageName, 
                                 NSString* activeImageName,
                                 id target,
                                 SEL obClickHandler) 
{
    UIButton* b = [UIButton buttonWithType:UIButtonTypeCustom];
    [b setImage:[GlobalHelper nonCachedImage:imageName ofType:@"png"] 
       forState:UIControlStateNormal];
    [b setImage:[GlobalHelper nonCachedImage:activeImageName ofType:@"png"] 
       forState:UIControlStateHighlighted];
    [b addTarget:target action:obClickHandler forControlEvents:UIControlEventTouchUpInside];    
    b.frame= frame;
    return b;
}


- (UIButton *) createSendButton {
    CGFloat yMarker = 295;

    UIButton* b = createSpecialButton(CGRectMake(160, yMarker, 70, 45),
                                          @"Share_Btn",
                                          @"Share_Selected_Btn",
                                          self,
                                          @selector(sendAction));
    b.accessibilityHint = @"Send it!";
    b.accessibilityLabel = @"Stuff for voiceover to be added";
    [self.view addSubview:b];

    return b;
}

Answer 1

您可以更改视图的accessibilityElements数组的顺序设置:

self.view.accessibilityElements = @[self.view1, self.view2, self.view3, self.view4];

要么

self.anotherView.accessibilityElements = @[self.label1, self.txtView1, self.label2, self.txtView2];

如果需要以编程方式设置交互:

[self.view1 setUserInteractionEnabled:YES];

如果视图被隐藏,则语音将不会通过它.

Answer 2

最简单的答案在于创建一个UIView包含按钮的子类,并对来自系统的可访问性调用做出不同的响应.这些重要的电话是:

-(NSInteger)accessibilityElementCount
-(id)accessibilityElementAtIndex:
-(NSInteger)indexOfAccessibilityElement:

我已经看过其中的一些问题,之前已经回答了一个问题,但我还没有看到如何重新排序VoiceOver焦点的一般示例.所以这里是一个如何创建UIView子类的示例,该子类通过标记将其可访问的子视图公开给VoiceOver.

AccessibilitySubviewsOrderedByTag.h

#import <UIKit/UIKit.h>
@interface AccessibilitySubviewsOrderedByTag : UIView
@end

AccessibilitySubviewsOrderedByTag.m

#import "AccessibilityDirectional.h"
@implementation AccessibilitySubviewsOrderedByTag {
    NSMutableArray *_accessibilityElements;
}
    //Lazy loading accessor, avoids instantiating in initWithCoder, initWithFrame, or init.
-(NSMutableArray *)accessibilityElements{
    if (!_accessibilityElements){
        _accessibilityElements = [[NSMutableArray alloc] init];
    }
    return _accessibilityElements;
}
// Required accessibility methods...
-(BOOL)isAccessibilityElement{
    return NO;
}
-(NSInteger)accessibilityElementCount{
    return [self accessibilityElements].count;
}
-(id)accessibilityElementAtIndex:(NSInteger)index{
    return [[self accessibilityElements] objectAtIndex:index];
}
-(NSInteger)indexOfAccessibilityElement:(id)element{
    return [[self accessibilityElements] indexOfObject:element];
}
// Handle added and removed subviews...
-(void)didAddSubview:(UIView *)subview{
    [super didAddSubview:subview];
    if ([subview isAccessibilityElement]){
        // if the new subview is an accessibility element add it to the array and then sort the array.
        NSMutableArray *accessibilityElements = [self accessibilityElements];
        [accessibilityElements addObject:subview];
        [accessibilityElements sortUsingComparator:^NSComparisonResult(id obj1, id obj2){
            // Here we'll sort using the tag, but really any sort is possible.
            NSInteger one = [(UIView *)obj1 tag];
            NSInteger two = [(UIView *)obj2 tag];
            if (one < two) return NSOrderedAscending;
            if (one > two) return NSOrderedDescending;
            return NSOrderedSame;
        }];
    }
}
-(void)willRemoveSubview:(UIView *)subview{
    [super willRemoveSubview:subview];
    // Clean up the array. No check since removeObject: is a safe call.
    [[self accessibilityElements] removeObject:subview];
}
@end

现在只需将按钮包含在此视图的实例中,并将按钮上的tag属性设置为焦点顺序.

Answer 3

在Swift中,您只需设置view的accessiblityElements数组属性:

view.accessibilityElements = [view1, view2, view3] //你希望拥有的订单

Answer 4

我知道这是一个旧线程，但我发现最简单的方法是子类化UIView. 然后只需将故事板中的主要UIView类型修改为AccessibiltySubviewsOrderedByTag并更新要按顺序阅读的每个子视图中的标签即可。

class AccessibilitySubviewsOrderedByTag: UIView {
    
    override func layoutSubviews() {
        
        self.accessibilityElements = [UIView]()
        for accessibilitySubview in self.subviews {
            if accessibilitySubview.isAccessibilityElement {
                self.accessibilityElements?.append(accessibilitySubview)
            }
        }
        self.accessibilityElements?.sort(by: {($0 as AnyObject).tag < ($1 as AnyObject).tag})
    }
}