Objective c 将字体大小设置为UIActionSheet标题

我需要设置大小UIActionSheet标题“选择要复制的选项”

使用此代码：

  [[UIActionSheet alloc] initWithTitle:@"Select option to copy:" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil
                                     otherButtonTitles:@"copy all ",nil];

---

您可以使用此delgate更改

uiactionsheet

的标题字体

  -(void)willPresentActionSheet:(UIActionSheet *)actionSheet {
        for (UIView *_currentView in actionSheet.subviews) {
            if ([_currentView isKindOfClass:[UILabel class]]) {
                UILabel *l = [[UILabel alloc] initWithFrame:_currentView.frame];
                l.text = [(UILabel *)_currentView text];
                [l setFont:[UIFont fontWithName:@"Arial-BoldMT" size:20]];
                l.textColor = [UIColor darkGrayColor];
                l.backgroundColor = [UIColor clearColor];
                [l sizeToFit];
                [l setCenter:CGPointMake(actionSheet.center.x, 25)];
                [l setFrame:CGRectIntegral(l.frame)];
                [actionSheet addSubview:l];
                _currentView.hidden = YES;
                break;
            }
        }
    }

---

您可以利用运行时属性设置字体。通过使用

NSAttributedString

可以实现这一点

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil
                                     otherButtonTitles:@"copy all ",nil];

//Creating Attributed String with System Font size of 30.0f
NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"Select option to copy:" attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:30.0f]}];

//Accessing the Alert View Controller property from Action Sheet
UIAlertController *alertController = [actionSheet valueForKey:@"_alertController"];

//Setting Attributed Title property of Alert View Controller
[alertController setValue:attrString forKey:@"_attributedTitle"];

//Displaying the Action Sheet
[actionSheet showInView:self.view];

---

你试过什么？您是如何创建此行动表的？给我们看一些代码；）它仍然不会改变尺寸）；我添加了一个问题：ios版本是7还是8？视图层次结构确实已经改变了，在ios 8或更高版本中，您不应该再使用UIActionSheet。UIActionSheet已弃用。将UIAlertController与首选样式UIAlertControllerStyleActionSheet一起使用“如何更改蓝色按钮的字体大小？@RoeiNadam在actionsheet中没有API来修改操作按钮的字体。话虽如此，我想看看是否有人能想出解决方案。好的，它包括按钮标题的颜色？您可以通过设置ActionSheet的

tintColor

属性来更改颜色，或者如果您希望每个按钮都有不同的颜色，则使用

UIAlertViewController

。对于每个

UIAlertAction

，都有一个名为

\u titleTextColor

的运行时属性。使用此属性可以更改每个项目的颜色