导航项.titleView中标题和字幕的字体大小未更改

Question

我的目标是在导航控制器页面标题中使用标题和带有不同字体大小的字幕（标题应该更大，字幕应该相应地更低）。

我找到了实现此目的的代码示例。 唯一的问题是未应用字体大小-标题和副标题都具有相同的字体大小。 像字体大小的代码不起作用。

如何解决？ 谢谢

// prepare title label
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.textColor = [UIColor whiteColor];
titleLabel.font = [UIFont fontWithName:@"HelveticaNeueLight" size:19.0];
titleLabel.text = locationInfo;
[titleLabel sizeToFit];

// prepare subtitle label
UILabel *subtitleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 18, 0, 0)];
subtitleLabel.backgroundColor = [UIColor clearColor];
subtitleLabel.textColor = [UIColor whiteColor];
subtitleLabel.font = [UIFont fontWithName:@"HelveticaNeueLight" size:12.0];
subtitleLabel.text = dateInfo;
[subtitleLabel sizeToFit];

UIView *twoLineTitleView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, MAX(subtitleLabel.frame.size.width, titleLabel.frame.size.width), 30)];
[twoLineTitleView addSubview:titleLabel];
[twoLineTitleView addSubview:subtitleLabel];

float widthDiff = subtitleLabel.frame.size.width - titleLabel.frame.size.width;

if (widthDiff > 0) {
    CGRect frame = titleLabel.frame;
    frame.origin.x = widthDiff / 2;
    titleLabel.frame = CGRectIntegral(frame);
} else{
    CGRect frame = subtitleLabel.frame;
    frame.origin.x = fabs(widthDiff) / 2;
    subtitleLabel.frame = CGRectIntegral(frame);
}

self.navigationItem.titleView = twoLineTitleView;

Answer 1

使用setFont方法，而不是.font

[titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:12.0]];

而且您在字体名称中有一个错误：

it's HelveticaNeue-Light

Answer 2

使用SetFont代替Font ::

[titleLabel setFont:[UIFont fontWithName:@"HelveticaNeue-UltraLight" size:14.0]];