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

- (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 *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];
                     }
     ];
}