继承自UIControl的自定义控件,监测其所有行为的方法

继承自UIControl的自定义控件,检测其所有行为的方法

- (void)sendActionsForControlEvents:(UIControlEvents)controlEvents;                        // send all actions associated with events

比如该控件的值有所改变

[self sendActionsForControlEvents:UIControlEventValueChanged];

监测值改变

[_contentInputAccessoryView addTarget:self action:@selector(changeTextInputView:) forControlEvents:UIControlEventValueChanged];