处理UI

CustomKeyboard/View/KBFunctionBarView.m

@@ -78,9 +78,8 @@
     }];
     self.leftButtonsInternal = leftBtns.copy;
 
-    // 右侧3个等宽按钮（靠右）
+    // 右侧N个按钮（靠右、两两等宽）
     NSMutableArray<UIButton *> *rightBtns = [NSMutableArray arrayWithCapacity:3];
-    UIView *next = nil;
     for (NSInteger i = 0; i < self.rightTitles.count; i++) {
         UIButton *btn = [self buildButtonWithTitle:(i < self.rightTitles.count ? self.rightTitles[i] : [NSString stringWithFormat:@"R%ld", (long)i])];
         btn.tag = 200 + i;
@@ -89,25 +88,27 @@
         [rightBtns addObject:btn];
     }
 
-    // 从右往左排，保证整体靠右
-    UIButton *r0 = rightBtns.count > 0 ? rightBtns[0] : nil;
-    UIButton *r1 = rightBtns.count > 1 ? rightBtns[1] : nil;
-    UIButton *r2 = rightBtns.count > 2 ? rightBtns[2] : nil;
-    if (r0 && r1 && r2) {
-        [r2 mas_makeConstraints:^(MASConstraintMaker *make) {
-            make.right.equalTo(self.rightContainer.mas_right);
+    // 从右往左链式布局，保证整体靠右；支持 1/2/3... 任意数量
+    UIView *prevRight = nil; // 指向右侧已布局的按钮
+    for (NSInteger i = rightBtns.count - 1; i >= 0; i--) {
+        UIButton *btn = rightBtns[i];
+        [btn mas_makeConstraints:^(MASConstraintMaker *make) {
+            if (!prevRight) {
+                // 最右侧按钮贴右
+                make.right.equalTo(self.rightContainer.mas_right);
+            } else {
+                // 其余按钮紧挨左侧兄弟，且与其等宽
+                make.right.equalTo(prevRight.mas_left).offset(-8);
+                make.width.equalTo(prevRight);
+            }
             make.top.bottom.equalTo(self.rightContainer);
         }];
-        [r1 mas_makeConstraints:^(MASConstraintMaker *make) {
-            make.right.equalTo(r2.mas_left).offset(-8);
-            make.top.bottom.equalTo(self.rightContainer);
-            make.width.equalTo(r2);
-        }];
-        [r0 mas_makeConstraints:^(MASConstraintMaker *make) {
-            make.right.equalTo(r1.mas_left).offset(-8);
-            make.top.bottom.equalTo(self.rightContainer);
-            make.width.equalTo(r1);
-            make.left.greaterThanOrEqualTo(self.rightContainer.mas_left); // 内容撑开
+        prevRight = btn;
+    }
+    // 最左侧一个不超出容器左边（允许根据内容自然宽度收缩）
+    if (prevRight) {
+        [prevRight mas_makeConstraints:^(MASConstraintMaker *make) {
+            make.left.greaterThanOrEqualTo(self.rightContainer.mas_left);
         }];
     }