2

CustomKeyboard/View/KBStreamTextView.m

@@ -56,6 +56,9 @@
     _scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
     _scrollView.alwaysBounceVertical = YES;
     _scrollView.showsVerticalScrollIndicator = YES;
+    // 留一点底部余量，避免最后一行视觉上“贴底被遮住”的感觉
+    _scrollView.contentInset = UIEdgeInsetsMake(0, 0, 6, 0);
+    _scrollView.scrollIndicatorInsets = _scrollView.contentInset;
     [self addSubview:_scrollView];
 }
 
@@ -171,7 +174,6 @@
     label.textColor = self.labelTextColor;
     label.userInteractionEnabled = YES;
     label.text = @"";
-    label.backgroundColor = [UIColor redColor];
     UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleLabelTap:)];
     [label addGestureRecognizer:tap];
 
@@ -196,8 +198,10 @@
         NSString *trimmed = [current.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
         current.text = trimmed;
         self.buffer = trimmed;
-        [self layoutLabelsForCurrentWidth];
     }
+    // 无论是否裁剪，都重新布局并滚动到底部，避免最后一段显示不全
+    [self layoutLabelsForCurrentWidth];
+    [self scrollToBottomIfNeeded];
 }
 
 - (void)layoutSubviews {
@@ -247,7 +251,8 @@
     CGFloat contentHeight = self.scrollView.contentSize.height;
     if (contentHeight > height && height > 0) {
         CGPoint bottomOffset = CGPointMake(0, contentHeight - height);
-        [self.scrollView setContentOffset:bottomOffset animated:YES];
+        // 使用无动画滚动，避免在短时间内多次追加时“最后一行没完全跟上”的错觉
+        [self.scrollView setContentOffset:bottomOffset animated:NO];
     }
 }