new Picker()
拾取器类，负责管理场景拾取功能
Members
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enable :boolean
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开启/关闭拾取功能
Example
THING.App.current.picker.enable = false; let ret = THING.App.current.picker.enable == false; // @expect(ret == true);
Picker()
Picker管理场景拾取功能
THING.App.current.picker.enable = false;
let ret = THING.App.current.picker.enable == false;
// @expect(ret == true);