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