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目标C的估算
原标题:Animation in objective C
-(IBAction)nextButtonAction:(id)sender{
    UIView *newView=[[UIView alloc]initWithFrame:CGRectMake(0.0f,0.0f,320.0f,416.0f)];
    UIImageView *newImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0.0,0.0, 320.0,416.0 )];
    UIImageView *upperImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0.0, 0.0, 320.0,416)];
    if(pageCount == 72){
        backBarButton.title=@"About Us";
        if(img){
            [newImageView setImage:[UIImage imageNamed:@"splashscreenhsd.png"]];}
        else{
            [newImageView setImage:[UIImage imageNamed:@"splashscreen.png"]];
        }

        [titleBarItem setTitle:@"0/72"];
        [newView addSubview:newImageView];
        pageCount=0;
    }   else {
        pageCount++;
        NSString *page=[NSString stringWithFormat:@"pagehsd%d.png",pageCount];
        NSString *pageString=[NSString stringWithFormat:@"page%d.png",pageCount];

        if(img){
            [upperImageView setImage:[UIImage imageNamed:page]];
        }
        else{

            [upperImageView setImage:[UIImage imageNamed:pageString]]; }
        if(img){
            [newImageView setImage:[UIImage imageNamed:@"backgroundhsd.png"]];}
        else{
            [newImageView setImage:[UIImage imageNamed:@"background.png"]];
        }
        [newImageView addSubview:upperImageView];
        [newView addSubview:newImageView];
        [titleBarItem setTitle:[NSString stringWithFormat:@"%d/72",pageCount]];     
        aboutUsButton.title=@"Back";   
    }
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:[self view] cache:NO];
    [[self view] addSubview:newView];
    [UIView commitAnimations];
}

我正在使用这一法典,在这一点上存在问题,当我继续点击下台纽扣时,每点点击就会更快,而且 an灭是看不见的。 我要谈谈这一问题的解决办法。

问题回答

玩).时间(秒)。 缺省值为0.2





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