Merge pull request Tencent#1036 from kimwjc/ToastAccessibility

[fix][无障碍]修复在旁白开启状态下Toast内的信息无法被视障用户获取的问题
tzouzou · Jun 30, 2020 · ea03de8 · ea03de8
2 parents 3c11f4f + 5d995e3
commit ea03de8
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/QMUIKit/QMUIComponents/QMUITips.m b/QMUIKit/QMUIComponents/QMUITips.m
@@ -139,6 +139,24 @@ - (void)showTipWithText:(NSString *)text detailText:(NSString *)detailText hideA
     } else if (delay > 0) {
         [self hideAnimated:YES afterDelay:delay];
     }
+
+    [self postAccessibilityAnnouncement:text detailText:detailText];
+}
+
+- (void)postAccessibilityAnnouncement:(NSString *)text detailText:(NSString *)detailText {
+    NSString *announcementString = nil;
+    if (text) {
+        announcementString = text;
+    }
+    if (detailText) {
+        announcementString = announcementString ? [text stringByAppendingFormat:@", %@", detailText] : detailText;
+    }
+    if (announcementString) {
+        // 发送一个让VoiceOver播报的Announcement，帮助视障用户获取toast内的信息，但是这个播报会被即时打断而不生效，所以在这里延时1秒发送此通知。
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            UIAccessibilityPostNotification(UIAccessibilityAnnouncementNotification, announcementString);
+        });
+    }
 }
 
 + (NSTimeInterval)smartDelaySecondsForTipsText:(NSString *)text {