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

#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{    }

这里没有写点击每个控件的具体实现方法。

DEMO下载

http://pan.baidu.com/share/link?shareid=73529&uk=101519637