iOS开发之启动动画(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

  - (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

  @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 *<a href="http://www.it165.net/edu/ebg/" target="_blank" class="keylink">word</a>_ = [[UIImageView alloc]initWithFrame:CGRectMake(75, 440, 170, 29)];
      <a href="http://www.it165.net/edu/ebg/" target="_blank" class="keylink">word</a>_.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。