[原创] Assistant editor 取消拖拽 binding 的 UI 元素
1. press up-right button "show the utilities"
2. press "show the Connections inspector"
2. press UI element in the storyboard
3. cancel "Sent events"
1. press up-right button "show the utilities"
2. press "show the Connections inspector"
2. press UI element in the storyboard
3. cancel "Sent events"