uicontrolevent

首先，UIControlEvents有这个几种：
UIControlEventTouchDown = 1 << 0, // on all touch downs
UIControlEventTouchDownRepeat = 1 << 1, // on multiple touchdowns (tap count > 1)
UIControlEventTouchDragInside = 1 << 2,
UIControlEventTouchDragOutside = 1 << 3,
UIControlEventTouchDragEnter = 1 << 4,
UIControlEventTouchDragExit = 1 << 5,
UIControlEventTouchUpInside = 1 << 6,
UIControlEventTouchUpOutside = 1 << 7,
UIControlEventTouchCancel = 1 << 8,
---------------------------------------------------------------------------------------------------UIControlEventValueChanged = 1 << 12, // sliders, etc.
UIControlEventEditingDidBegin = 1 << 16, // UITextField
UIControlEventEditingChanged = 1 << 17,
UIControlEventEditingDidEnd = 1 << 18,
UIControlEventEditingDidEndOnExit = 1 << 19, // 'return key' ending editing
UIControlEventAllTouchEvents = 0x00000FFF, // for touch events
UIControlEventAllEditingEvents = 0x000F0000, // for UITextField
UIControlEventApplicationReserved = 0x0F000000, // range available for application use
UIControlEventSystemReserved = 0xF0000000, // range reserved for internal framework use
UIControlEventAllEvents = 0xFFFFFFFF

http://blog.163.com/cz_jdton/blog/static/92732504201282543017312/
在这个网友的日志里看到一些内容，大体如下：
UIControlEventTouchDown
单点触摸按下事件：用户点触屏幕，或者又有新手指落下的时候。
UIControlEventTouchDownRepeat
多点触摸按下事件，点触计数大于1：用户按下第二、三、或第四根手指的时候。
UIControlEventTouchDragInside
当一次触摸在控件窗口内拖动时。
UIControlEventTouchDragOutside
当一次触摸在控件窗口之外拖动时。
UIControlEventTouchDragEnter
当一次触摸从控件窗口之外拖动到内部时。
UIControlEventTouchDragExit
当一次触摸从控件窗口内部拖动到外部时。

UIControlEventTouchUpInside
所有在控件之内触摸抬起事件。
UIControlEventTouchUpOutside
所有在控件之外触摸抬起事件(点触必须开始与控件内部才会发送通知)。
UIControlEventTouchCancel
所有触摸取消事件，即一次触摸因为放上了太多手指而被取消，或者被上锁或者电话呼叫打断。
UIControlEventTouchChanged
当控件的值发生改变时，发送通知。用于滑块、分段控件、以及其他取值的控件。你可以配置滑块控件何时发送通知，在滑块被放下时发送，或者在被拖动时发送。
UIControlEventEditingDidBegin
当文本控件中开始编辑时发送通知。
UIControlEventEditingChanged
当文本控件中的文本被改变时发送通知。
UIControlEventEditingDidEnd
当文本控件中编辑结束时发送通知。
UIControlEventEditingDidOnExit
当文本控件内通过按下回车键（或等价行为）结束编辑时，发送通知。
UIControlEventAlltouchEvents
通知所有触摸事件。
UIControlEventAllEditingEvents
通知所有关于文本编辑的事件。
UIControlEventAllEvents
通知所有事件。

为了验证下，做了一个实验：

001
//
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// ViewController.m
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// UIControlEvents
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//
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// Created by WeiZhen_Liu on 13-4-27.
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// Copyright (c) 2013年 WeiZhen_Liu. All rights reserved.
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//
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import "ViewController.h"

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@interface ViewController ()
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@end
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@implementation ViewController
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• (void)viewDidLoad
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  {
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  [super viewDidLoad];
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  UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
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  [button setFrame:CGRectMake(10, 100, 300, 40)];
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  [button setTitle:@"Test" forState:UIControlStateNormal];
  023
  [button addTarget:self action:@selector(TouchDown:) forControlEvents:UIControlEventTouchDown];
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  [button addTarget:self action:@selector(TouchDownRepeat:) forControlEvents:UIControlEventTouchDownRepeat];
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  [button addTarget:self action:@selector(TouchDragInside:) forControlEvents:UIControlEventTouchDragInside];
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  [button addTarget:self action:@selector(TouchDragOutside:) forControlEvents:UIControlEventTouchDragOutside];
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  [button addTarget:self action:@selector(TouchDragEnter:) forControlEvents:UIControlEventTouchDragEnter];
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  [button addTarget:self action:@selector(TouchDragExit:) forControlEvents:UIControlEventTouchDragExit];
  029
  [button addTarget:self action:@selector(TouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
  030
  [button addTarget:self action:@selector(TouchUpOutside:) forControlEvents:UIControlEventTouchUpOutside];
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  [button addTarget:self action:@selector(TouchCancel:) forControlEvents:UIControlEventTouchCancel];
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  UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(buttonLongPress:)];
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  longPress.minimumPressDuration = 3;
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  [button addGestureRecognizer:longPress];
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  [longPress release];
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  [self.view addSubview:button];
  037
  }
  038

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• (void)TouchDown:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchDownRepeat:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchDragInside:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchDragOutside:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
  059

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• (void)TouchDragEnter:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
  064

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• (void)TouchDragExit:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchUpInside:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchUpOutside:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)TouchCancel:(id)sender
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)didReceiveMemoryWarning
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  {
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  [super didReceiveMemoryWarning];
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  // Dispose of any resources that can be recreated.
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  }
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• (void)buttonLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
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  {
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  if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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  }
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@end
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/**
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• UIControlEventTouchDown = 1 << 0, // on all touch downs
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• UIControlEventTouchDownRepeat = 1 << 1, // on multiple touchdowns (tap count > 1)
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• UIControlEventTouchDragInside = 1 << 2,
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• UIControlEventTouchDragOutside = 1 << 3,
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• UIControlEventTouchDragEnter = 1 << 4, // 注：我在模拟器上找了好久没找到这个东西什么时候触法
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• UIControlEventTouchDragExit = 1 << 5,
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• UIControlEventTouchUpInside = 1 << 6,
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• UIControlEventTouchUpOutside = 1 << 7,
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• UIControlEventTouchCancel = 1 << 8,
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• 按下松开，依次触发： TouchDown: TouchUpInside:
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• 按下并在按钮内部拖动最后松开，依次触发： TouchDown: TouchDragInside:(多次) TouchUpInside:
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• 按着按钮拖动到按钮外不远处，依次触发： TouchDown: TouchDragInside:(多次) TouchUpInside:
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• 按着按钮拖动到按钮外很远处，依次触发： TouchDown: TouchDragInside:(多次) TouchDragExit: TouchDragOutside:(多次) TouchUpOutside:
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• 快速双击两下，依次触发： TouchDown: TouchUpInside: TouchDown: TouchDownRepeat: TouchUpInside:
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• 快速击三下，依次触发： TouchDown: TouchUpInside: TouchDown: TouchDownRepeat: TouchUpInside: TouchDown: TouchDownRepeat: TouchUpInside:
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• 长按会依次触发： TouchDown: buttonLongPress: TouchCancel:
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  */
  118

---

说到UIControlEvent,再谈下UIControl, UIControl继承于UIView， 可以接收事件响应，看Demo:

01

• (void)viewDidLoad
  02
  {
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  [super viewDidLoad];
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  // UIControl : UIView
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  UIControl *control = [[UIControl alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];
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  control.backgroundColor = [UIColor blueColor];
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  [control addTarget:self action:@selector(controlViewClick_1) forControlEvents:UIControlEventTouchUpInside];
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  [control addTarget:self action:@selector(controlViewClick_2) forControlEvents:UIControlEventTouchUpInside];
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  [control addTarget:self action:@selector(controlViewClick_3) forControlEvents:UIControlEventTouchUpInside];
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  [self.view addSubview:control];
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  [control release];
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  }
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• (void)controlViewClick_1
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)controlViewClick_2
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }
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• (void)controlViewClick_3
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  {
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  NSLog(@"%@", NSStringFromSelector(_cmd));
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  }

程序打印：

2013-05-01 12:36:28.119 UIControlEventsTestDemo[1152:c07] controlViewClick_1

2013-05-01 12:36:28.122 UIControlEventsTestDemo[1152:c07] controlViewClick_2

2013-05-01 12:36:28.122 UIControlEventsTestDemo[1152:c07] controlViewClick_3