iPhone开发之启动画面及动画

概述一、静态图片的设置 iOS设备现在有三种不同的分辨率：iPhone 320x480、iPhone 4 640x960、iPad 768x1024。以前程序的启动画面(图片)只要准备一个 Default.png就可以了，但是现在变得复杂多了。下面就是 CocoaChina 会员做得总结   如果一个程序，既支持iPhone又支持iPad，那么它需要包含下面几个图片： Default-Portrait

一、静态图片的设置

iOS设备现在有三种不同的分辨率：iPhone 320x480、iPhone 4 640x960、iPad 768x1024。以前程序的启动画面(图片)只要准备一个 Default.png就可以了，但是现在变得复杂多了。下面就是 CocoaChina 会员做得总结

  如果一个程序，既支持iPhone又支持iPad，那么它需要包含下面几个图片：

Default-Portrait.png iPad专用竖向启动画面 768x1024或者768x1004

Default-Landscape.png iPad专用横向启动画面 1024x768或者1024x748

Default-PortraitUpsIDeDown.png iPad专用竖向启动画面(Home按钮在屏幕上面)，可省略 768x1024或者768x1004

Default-Landscapeleft.png iPad专用横向启动画面，可省略 1024x768或者1024x748

Default-LandscapeRight.png iPad专用横向启动画面，可省略 1024x768或者1024x748

Default.png iPhone默认启动图片，如果没有提供上面几个iPad专用启动图片，则在iPad上运行时也使用Default.png（不推荐） 320x480或者320x460

Default@2x.png iPhone4启动图片640x960或者640x920

 

  为了在iPad上使用上述的启动画面，你还需要在info.pList中加入key: UISupportedInterfaceOrIEntations。同时，加入值UIInterfaceOrIEntationPortrait,UIInterfacOrIEntationPortraitUpsIDeDown,UIInterfaceOrIEntationLandscapeleft,UIInterfaceOrIEntationLandscapeRight。

 

二、设置静态图片停留的时间

在- (BOol)application:(UIApplication *)application dIDFinishLaunchingWithOptions:(NSDictionary *)launchOptions中使用下面集中方法都可以：

1、sleep(3);

2、[NSThread sleepForTimeInterval:5.0];

3、[selfperformSelector:@selector(startupvIEw)withObject:nilafterDelay:3];

 

三、设置启动动画

在appDelegate中加载启动动画的controller，在开启动画的controller中载入首页controller，通过透明度来设置淡入和淡出。

appDelegate.h

#import <UIKit/UIKit.h>#import "Startupscreen.h"@interface AppDelegate : UIResponder <UIApplicationDelegate> {     Startupscreen *startupscreen;}@property (strong,nonatomic) UIWindow *window;@property (nonatomic,retain) Startupscreen *startupscreen;@end

appDelegate.m

- (BOol)application:(UIApplication *)application dIDFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    NSLog(@"dIDFinishLaunchingWithOptions");    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    startupscreen = [[Startupscreen alloc] initWithNibname:@"Startupscreen" bundle:nil];    [self.window addSubvIEw:startupscreen.vIEw];    [self.window makeKeyAndVisible];    return YES;}

Startupscreen.h

#import <UIKit/UIKit.h>#import "VIEwController.h"@interface Startupscreen : UIVIEwController{    NSTimer *timer;    UIImageVIEw *splashImageVIEw;    UINavigationController *nav;    VIEwController *myvIEwcontroller;}@property (nonatomic,retain) NSTimer *timer;@property (nonatomic,retain) UIImageVIEw *splashImageVIEw;@property (nonatomic,retain) UINavigationController *nav;@property (nonatomic,retain) VIEwController *myvIEwcontroller;@end

Startupscreen.m

#import "Startupscreen.h"#import "VIEwController.h"@interface Startupscreen ()@end@implementation Startupscreen@synthesize timer;@synthesize splashImageVIEw;@synthesize nav;@synthesize myvIEwcontroller;int flag;NSTimer *timer;- (ID)initWithNibname:(Nsstring *)nibnameOrNil bundle:(NSBundle *)nibBundleOrNil{    self = [super initWithNibname:nibnameOrNil bundle:nibBundleOrNil];    if (self) {        // Custom initialization    }    return self;}- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    // Do any additional setup after loading the vIEw from its nib.        CGRect appFrame = [[UIScreen mainScreen] applicationFrame];        UIVIEw *vIEw = [[UIVIEw alloc] initWithFrame:appFrame];        vIEw.autoresizingMask = UIVIEwautoresizingFlexibleHeight|UIVIEwautoresizingFlexibleWIDth;        self.vIEw = vIEw;        [vIEw release];                flag = 0;        splashImageVIEw = [[UIImageVIEw alloc] initWithImage:[UIImage imagenamed:@"c618Default1.png"]];    splashImageVIEw.frame = CGRectMake(0,0,768,1004);    [self.vIEw addSubvIEw:splashImageVIEw];    timer = [NSTimer scheduledTimerWithTimeInterval:0.6                                              target:self                                            selector:@selector(addLabel)                                            userInfo:nil                                             repeats:YES];        myvIEwcontroller = [[VIEwController alloc] initWithNibname:@"VIEwController" bundle:nil];    myvIEwcontroller.vIEw.Alpha = 0.0;    //[self.vIEw addSubvIEw:myvIEwcontroller.vIEw];    nav = [[UINavigationController alloc] init];    [nav pushVIEwController:myvIEwcontroller animated:NO];    [self.vIEw addSubvIEw:nav.vIEw];            timer = [NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(fadeScreen) userInfo:nil repeats:NO];           }- (voID)addLabel{        flag++;    if (flag <=5) {        UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(200+50*flag,600,40,40)];        label1.text = @"123";        label1.Font = [UIFont systemFontOfSize:23];        label1.textcolor = [UIcolor whitecolor];        [self.vIEw addSubvIEw:label1];        [label1 release];    }    }- (voID)fadeScreen{    [UIVIEw beginAnimations:nil context:nil]; // begins animation block    [UIVIEw setAnimationDuration:0.75];        // sets animation duration    [UIVIEw setAnimationDelegate:self];        // sets delegate for this block    [UIVIEw setAnimationDIDStopSelector:@selector(finishedFading)];   // calls the finishedFading method when the animation is done (or done fading out)        self.vIEw.Alpha = 0.0;       // Fades the Alpha channel of this vIEw to "0.0" over the animationDuration of "0.75" seconds    [UIVIEw commitAnimations];   // commits the animation block.  This Block is done.}- (voID) finishedFading{        [UIVIEw beginAnimations:nil context:nil]; // begins animation block    [UIVIEw setAnimationDuration:0.75];        // sets animation duration    self.vIEw.Alpha = 1.0;   // fades the vIEw to 1.0 Alpha over 0.75 seconds    myvIEwcontroller.vIEw.Alpha = 1.0;    [UIVIEw commitAnimations];   // commits the animation block.  This Block is done.        for(UIVIEw *mylabelvIEw in [self.vIEw subvIEws])    {        if ([mylabelvIEw isKindOfClass:[UILabel class]]) {            [mylabelvIEw removeFromSupervIEw];        }    }        [splashImageVIEw removeFromSupervIEw];}

上述代码实现了一个简单的进度启动动画，供大家参考。

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