最近在使用《青蔥日記》這款App，發現它的啓動界面做的很精美。
不同我自己之前簡單的替換Default.png圖片。 它的動態效果做的不錯。
於是乎,花了點時間，自己實現了這個功能。 其實也很簡單，具體效果如下
實現起來也不困難。因爲我們知道，在應用啓動的時候,它會先執行AppDelegate.m中的
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(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions |
執行完之後,纔會進入視圖。如果，我們在這個方法中加入一些動畫，那麼就會在動畫執行完之後再進入我們的rootview。這就是實現原理。 很簡單吧。
下面直接給出實現這一效果的源碼,很簡單。不多說廢話（當然,實現方法很多。 我只是給出我自己的方法）
1.AppDelegate.h中聲明一個UIImageView
@property (strong, nonatomic) UIImageView *splashView;
2.AppDelegate.m實現相關功能
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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:^ { //
執行的動畫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) { //
完成後執行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) { //
完成後執行code [NSThread
sleepForTimeInterval:1.0f]; [splashView
removeFromSuperview]; } ];} |
