Question

我试图让用户自己调整字体大小来阅读应用内容。因此我放了一个滑块，如果用户向右滑动，字体将增长，左边意味着字体大小会更小。它工作正常，但问题是有时scrollView内容大小没有获得新的内容大小。这是我的方法：

- (IBAction)enlargeLabelWithSlider:(id)sender{

UISlider *slider = (UISlider *)sender;
int font = 0;
int currentSliderValue = (int)slider.value;

if (currentSliderValue<=lastSilderValue) /* Every time the method call, at the end lastSilderValue = currentSliderValue*/
{
    // Need to increase
    font =lastSilderValue - currentSliderValue;

    [self.gameTitleLabel setFont:[UIFont fontWithName:self.gameTitleLabel.font.fontName size:self.gameTitleLabel.font.pointSize+font]];
    [self.gameScoreLabel setFont:[UIFont fontWithName:self.gameScoreLabel.font.fontName size:self.gameScoreLabel.font.pointSize+font]];
    self.gameStateLabel.font = [UIFont systemFontOfSize:self.gameStateLabel.font.pointSize+font];
}
else
{
    // Need to decrease
    font =currentSliderValue - lastSilderValue;

    [self.gameTitleLabel setFont:[UIFont fontWithName:self.gameTitleLabel.font.fontName size:self.gameTitleLabel.font.pointSize-font]];
    [self.gameScoreLabel setFont:[UIFont fontWithName:self.gameScoreLabel.font.fontName size:self.gameScoreLabel.font.pointSize-font]];
    self.gameStateLabel.font = [UIFont systemFontOfSize:self.gameStateLabel.font.pointSize-font];
}
lastSilderValue = currentSliderValue;

CGFloat height = self.gameStateLabel.frame.origin.y+self.gameStateLabel.frame.size.height+20; 
CGSize size = CGSizeMake(self.ScrollView.frame.size.width, height);
self.ScrollView.contentSize = CGSizeMake(size.width, size.height); // i used self.gameStateLabel.frame.origin.y because it's the last label on the view.

}

有人能告诉我为什么会这样吗？感谢。

Answer 1

我看不到UILabel框架的任何变化。也许您必须使此框架适应新的字体大小，然后尝试修改scrollview contentSize属性。这将有所帮助：Adjust UILabel height depending on the text

ScrollView有时无法适应其子视图的内容

1 个答案: