iOS开发- 启动动画(动态欢迎界面,非静态Default)

最近在使用《青葱日记》这款App，发现它的启动界面做的很精美。

不同我自己之前简单的替换Default.png图片。 它的动态效果做的不错。

于是乎,花了点时间，自己实现了这个功能。 其实也很简单，具体效果如下

实现起来也不困难。因为我们知道，在应用启动的时候,它会先执行AppDelegate.m中的

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1	- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

执行完之后,才会进入视图。如果，我们在这个方法中加入一些动画，那么就会在动画执行完之后再进入我们的rootview。这就是实现原理。 很简单吧。

下面直接给出实现这一效果的源码,很简单。不多说废话（当然,实现方法很多。 我只是给出我自己的方法）

1.AppDelegate.h中声明一个UIImageView

@property (strong, nonatomic) UIImageView *splashView;

2.AppDelegate.m实现相关功能

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@synthesize splashView; - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {      // Override point for customization after application launch.      [self.window makeKeyAndVisible];            splashView = [[UIImageView alloc]initWithFrame:CGRectMake( 0 , 0 , 320 , 568 )];      [splashView setImage:[UIImage imageNamed:@ "back_" ]];            [self.window addSubview:splashView];      [self.window bringSubviewToFront:splashView];                  [self performSelector: @selector (scale_1) withObject:nil afterDelay: 0 .0f];      [self performSelector: @selector (scale_2) withObject:nil afterDelay: 0 .5f];      [self performSelector: @selector (scale_3) withObject:nil afterDelay: 1 .0f];      [self performSelector: @selector (scale_4) withObject:nil afterDelay: 1 .5f];      [self performSelector: @selector (scale_5) withObject:nil afterDelay: 2 .0f];      [self performSelector: @selector (showWord) withObject:nil afterDelay: 2 .5f];              return YES; }   -( void )scale_1 {      UIImageView *round_1 = [[UIImageView alloc]initWithFrame:CGRectMake( 100 , 240 , 15 , 15 )];      round_1.image = [UIImage imageNamed:@ "round_" ];      [splashView addSubview:round_1];      [self setAnimation:round_1]; }   -( void )scale_2 {      UIImageView *round_2 = [[UIImageView alloc]initWithFrame:CGRectMake( 105 , 210 , 20 , 20 )];      round_2.image = [UIImage imageNamed:@ "round_" ];      [splashView addSubview:round_2];      [self setAnimation:round_2]; }   -( void )scale_3 {      UIImageView *round_3 = [[UIImageView alloc]initWithFrame:CGRectMake( 125 , 170 , 30 , 30 )];      round_3.image = [UIImage imageNamed:@ "round_" ];      [splashView addSubview:round_3];      [self setAnimation:round_3]; }   -( void )scale_4 {      UIImageView *round_4 = [[UIImageView alloc]initWithFrame:CGRectMake( 160 , 135 , 40 , 40 )];      round_4.image = [UIImage imageNamed:@ "round_" ];      [splashView addSubview:round_4];      [self setAnimation:round_4]; }   -( void )scale_5 {      UIImageView *heart_1 = [[UIImageView alloc]initWithFrame:CGRectMake( 130 , 180 , 100 , 100 )];      heart_1.image = [UIImage imageNamed:@ "heart_" ];      [splashView addSubview:heart_1];      [self setAnimation:heart_1]; }   -( void )setAnimation:(UIImageView *)nowView {            [UIView animateWithDuration: 0 .6f delay: 0 .0f options:UIViewAnimationOptionCurveLinear                       animations:^                      {                          // 执行的动画code                          [nowView setFrame:CGRectMake(nowView.frame.origin.x- nowView.frame.size.width* 0.1 , nowView.frame.origin.y-nowView.frame.size.height* 0.1 , nowView.frame.size.width* 1.2 , nowView.frame.size.height* 1.2 )];                       }                       completion:^(BOOL finished)                      {                           // 完成后执行code                          [nowView removeFromSuperview];                       }       ];         }   -( void )showWord {            UIImageView *word_ = [[UIImageView alloc]initWithFrame:CGRectMake( 75 , 440 , 170 , 29 )];      word_.image = [UIImage imageNamed:@ "word_" ];      [splashView addSubview:word_];            word_.alpha = 0.0 ;      [UIView animateWithDuration: 1 .0f delay: 0 .0f options:UIViewAnimationOptionCurveLinear                       animations:^                       {                           word_.alpha = 1.0 ;                       }                       completion:^(BOOL finished)                       {                           // 完成后执行code                           [NSThread sleepForTimeInterval: 1 .0f];                           [splashView removeFromSuperview];                       }       ]; }

学习的路上,与君共勉。

转载自：http://www.2cto.com/kf/201402/277821.html