ios - UIView动画增加内存

Question

在我的项目中，我实现了一个水平滚动文本的股票动画。

我的问题是当我转到另一个 View Controller 时内存开始不断增加。

这是我的股票动画代码

-(void)scrollTheBreakingNews
{

if (isTicker)
{
    self.ticker.text = textToScroll;

    if (!pauseTicker)
    {
        if (isTicker)
        {
            NSAttributedString *str = [[NSAttributedString alloc]initWithString:textToScroll];

            CGSize textSize = [str size];

            if (isTicker)
            {
                float duration = (textSize.width + self.tickerView.frame.size.width) / 65.0f;

                float startingX=0.0f;
                float endX=0.0f;

                if (isTicker)
                {
                    self.ticker.frame = scrollLabelFrame;
                    if (isTicker)
                    {
                        startingX = self.tickerView.frame.size.width;
                        endX = -textSize.width;
                        if (isTicker)
                        {
                            self.ticker.frame = CGRectMake(startingX, 0.0f, textSize.width, 25.0f);

                            [UIView beginAnimations:@"" context:nil];
                            [UIView setAnimationCurve:UIViewAnimationCurveLinear];
                            [UIView setAnimationDuration:duration];
                            [UIView setAnimationDelegate:self];
                            [UIView setAnimationDidStopSelector:@selector(tickerStop)];

                            if (isTicker)
                            {
                                CGRect tickerFrame = self.ticker.frame;
                                tickerFrame.origin.x = endX;
                                if (isTicker)
                                {
                                    [self.ticker setFrame:tickerFrame];
                                    [UIView commitAnimations];
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

}

-(void)tickerStop
{
    if (isTicker)
    {
        if (!pauseTicker)
        {
            [self scrollTheBreakingNews];
        }

    }
    else
    {
        textToScroll=nil;
    }
}

内存是这样的:

请帮我解决这个问题。任何建议表示赞赏。提前致谢

Answer 1

好的，首先...哇，您需要改进代码风格。

让我试一试。

其次，停止使用旧式动画代码。文档甚至说从 iOS 4.0 开始不要使用它。

-(void)scrollTheBreakingNews
{
    //You are already checking isTicker here there is
    //no reason to check it another SEVEN times inside this block.
    if (isTicker)
    {
        self.ticker.text = textToScroll;

        if (!pauseTicker)
        {
            NSAttributedString *str = [[NSAttributedString alloc] initWithString:textToScroll];

            CGSize textSize = [str size];

            float duration = (textSize.width + self.tickerView.frame.size.width) / 65.0f;

            float startingX=0.0f;
            float endX=0.0f;

            self.ticker.frame = scrollLabelFrame;
            startingX = self.tickerView.frame.size.width;
            endX = -textSize.width;
            self.ticker.frame = CGRectMake(startingX, 0.0f, textSize.width, 25.0f);

            CGRect tickerFrame = self.ticker.frame;
            tickerFrame.origin.x = endX;

            [UIView animateWithDuration:duration
                                  delay:0.0
                                options:UIViewAnimationOptionsCurveLinear
                             animations:^(){
                                 self.ticker.frame = tickerFrame
                             }
                             completion:^(BOOL finished){
                                 [self tickerStop];
                             }];
        }
    }
}

-(void)tickerStop
{
    if (!pauseTicker
        && isTicker) {
        [self scrollTheBreakingNews];
    }
    else {
        textToScroll=nil;
    }
}

至于内存问题。我建议通过使用工具分析应用程序来找出导致问题的代码部分。

您可能会发现这无论如何都会提高内存使用率？也许可以，但不能 100% 确定这一点。