触摸板分段控制 | TouchBarSegmentedControl

类：TouchBarSegmentedControl

创建一个按钮具有选定状态的分段控件（按钮组）

过程：主

new TouchBarSegmentedControl(options) 试验

options 目的

-  `mode` String - (optional) The selection mode of the control: 
    -  `single` - Default. One item selected at a time, selecting one deselects the previously selected item.
    -  `multiple` - Multiple items can be selected at a time.
    -  `buttons` - Make the segments act as buttons, each segment can be pressed and released but never marked as active.

-  `segments` [SegmentedControlSegment[]](../structures/segmented-control-segment/index) - An array of segments to place in this control.
-  `selectedIndex` Integer (optional) - The index of the currently selected segment, will update automatically with user interaction. When the mode is multiple it will be the last selected item.
-  `change` Function - Called when the user selects a new segment 
    -  `selectedIndex` Integer - The index of the segment the user selected.
    -  `isSelected` Boolean - Whether as a result of user selection the segment is selected or not.

实例属性

以下属性可用于以下TouchBarSegmentedControl实例：

touchBarSegmentedControl.segmentStyle

一个String代表当前控制段风格。更新此值立即更新触摸栏中的控件。

touchBarSegmentedControl.segments

表示此控件中的段SegmentedControlSegment[]的数组。更新此值立即更新触摸栏中的控件。更新此阵列中的深层属性不会更新触摸栏。

touchBarSegmentedControl.selectedIndex

一个Integer表示当前选择的段。更改此值立即更新触摸栏中的控件。用户与触摸栏的交互将自动更新此值。