IOS代码实现常用控件UIButton、UISlider、UISwitch、UISegmentedControl

IOS中最常用到的控件UIButton、UISlider、UISwitch、UISegmentedControl通过Xib文件拖动生成非常简单，其实用代码实现也是一样的简单，当然，用代码实现能够掌握到更多的东西。

上图中包涵提到的4种控件，UIButton按钮、UISlider滑块、UISwitch开关、UISegmentedControl分类

首先创建一个名为CodeControls的Empty Application项目

AppDelegate.h和AppDelegate.m文件中和IOS代码实现Hello World中的一样

MainViewController.h

 <span style="font-size:10px;">#import <UIKit/UIKit.h>

 @interface MainViewController : UIViewController

 @property (strong, nonatomic) UIButton *myBtn;
 @property (strong, nonatomic) UISlider *mySlider;
 @property (strong, nonatomic) UISwitch *mySwitch;
 @property (strong, nonatomic) UISegmentedControl *mySc;

 @end</span>

MainViewController.m

 <span style="font-size:10px;">#import "MainViewController.h"

 @interface MainViewController ()

 @end

 @implementation MainViewController
 @synthesize myBtn,mySlider,mySwitch,mySc;

 - (void)viewDidLoad
 {
     // 加载UIView
     UIView *mainView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
     mainView.backgroundColor = [UIColor whiteColor];
     self.view = mainView;
     [mainView release];

     // 创建一个Button按钮
     UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
     btn.frame = CGRectMake(100, 30, 57, 57);
     [btn setTitle:@"Button" forState:UIControlStateNormal];
     [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
     [btn setBackgroundImage:[UIImage imageNamed:@"icon.png"] forState:UIControlStateNormal];
     [btn addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
     myBtn = btn;
     [self.view addSubview:myBtn];


     // 创建一个Slider划块按钮
     UISlider *slider = [[[UISlider alloc] initWithFrame:CGRectMake(50, 180, 200, 10)] autorelease];
     slider.minimumValue = 0.0f;
     slider.maximumValue = 100.0f;
     slider.value = 50.0f;
     [slider addTarget:self action:@selector(onChange:) forControlEvents:UIControlEventTouchUpInside];
     mySlider = slider;
     [self.view addSubview:mySlider];

     // 创建一个UISwitch开关按钮
     UISwitch *sbtn = [[[UISwitch alloc] initWithFrame:CGRectMake(50, 210, 200, 50)] autorelease];
     [sbtn addTarget:self action:@selector(onSwitch:) forControlEvents:UIControlEventTouchUpInside];
     mySwitch = sbtn;
     [self.view addSubview:mySwitch];

     // 创建一个UISegmentedControl
     NSArray *btnList = [NSArray arrayWithObjects:@"left",@"center",@"right", nil];
     UISegmentedControl *sc = [[[UISegmentedControl alloc] initWithItems:btnList] autorelease];
     sc.frame = CGRectMake(50, 250, 200, 60);
     [sc addTarget:self action:@selector(onSelect:) forControlEvents:UIControlEventTouchUpInside];
     mySc = sc;
     [self.view addSubview:mySc];

     [super viewDidLoad];
 }

 // 点击Button触发
 - (void)onClick:(id *)sender
 {

 }

 // 拉动Slider划块触发
 - (void)onChange:(id *)sender
 {

 }

 // 选择Switch触发
 - (void)onSwitch:(id *)sender
 {

 }

 // 选择UISegmentedControl触发
 - (void)onSelect:(id *)sender
 {
 }
 </span>

这里没有写点击每个控件的具体实现方法。

UICnotrol Class 下的所有Touch事件

 UIControlEventTouchDown
 UIControlEventTouchDownRepeat
 UIControlEventTouchDragInside
 UIControlEventTouchDragOutside
 UIControlEventTouchDragEnter
 UIControlEventTouchDragExit
 UIControlEventTouchUpInside
 UIControlEventTouchUpOutside
 UIControlEventTouchCancel
 UIControlEventValueChanged
 UIControlEventEditingDidBegin
 UIControlEventEditingChanged
 UIControlEventEditingDidEnd
 UIControlEventEditingDidEndOnExit
 UIControlEventAllTouchEvents
 UIControlEventAllEditingEvents
 UIControlEventApplicationReserved
 UIControlEventSystemReserved
 UIControlEventAllEvents

UIButton Class下的所有按钮样式

 UIButtonTypeCustom
 UIButtonTypeRoundedRect
 UIButtonTypeDetailDisclosure
 UIButtonTypeInfoLight