UIimageView 动画

  
    // 初始進入加載歡迎頁面
    self.splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
    _splashView.image = [UIImage imageNamed:@"img_login_bg"];
    
    _splashView.animationImages = [NSArray arrayWithObjects:
                                   
                                   [UIImage imageNamed:@"img_loading07"],
                                   
                                   [UIImage imageNamed:@"img_loading06"],
                                   
                                   [UIImage imageNamed:@"img_loading05"],
                                   
                                   [UIImage imageNamed:@"img_loading04"],
                                   
                                   [UIImage imageNamed:@"img_loading03"],
                                   
                                   [UIImage imageNamed:@"img_loading02"],
                                   
                                   [UIImage imageNamed:@"img_loading01"],nil];
    
    [self.window addSubview:_splashView];
    [self.window bringSubviewToFront:_splashView];
    _splashView.animationDuration = 1.0;
    _splashView.animationRepeatCount = 0;
    [_splashView startAnimating];