如何更改 UIPicker 中字符的大小
我正在尝试居中并更改 UIPicker 内文本的大小，但不确定如何...我认为这可能发生在其中一种方法中，很可能是第一种...
- (NSString*)pickerView:(UIPickerView*)pv titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [[NSString stringWithFormat:@"%x",row ] uppercaseString]; //Sets picker options as an Uppercase Hex value
}
#pragma mark UIPickerViewDataSource methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pv
{
return 5; //5 columns in the picker
}
- (NSInteger)pickerView:(UIPickerView*)pv numberOfRowsInComponent:(NSInteger)component
{
return 16;
}
有人知道如何做到这一点吗？我环顾四周，但文档相当薄......
I am trying to center and change the size of the text inside my UIPicker but am not sure how... I think it might happen in one of these methods, most likely the first...
- (NSString*)pickerView:(UIPickerView*)pv titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [[NSString stringWithFormat:@"%x",row ] uppercaseString]; //Sets picker options as an Uppercase Hex value
}
#pragma mark UIPickerViewDataSource methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pv
{
return 5; //5 columns in the picker
}
- (NSInteger)pickerView:(UIPickerView*)pv numberOfRowsInComponent:(NSInteger)component
{
return 16;
}
Dose anyone one know how this can be done? I have looked around but the documentation is fairly thin...
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Johns，
就像在表视图中一样，您无法更改通常在 titleForRow 委托方法中设置的默认标题的字体属性，而是必须使用以下方法：
这里您可以使用自定义 UILabel 创建一个 UIView 并设置Label 的字体大小、颜色和其他属性。
此方法在 Apple 的 UIPickerView 类参考< /a>
希望这对您有帮助！
Johns,
As in Table Views, you can't change the font attributes of the default title that you usually set in the titleForRow delegate method, instead you have to use the following method:
Here you can create an UIView with a custom UILabel and set the Label's font size, color and other attributes.
This method is described in Apple's UIPickerView Class Reference
Hope this help you!
现在，在 iOS 6 中，您可以使用 NSAttributedStrings 自定义标题文本（尽管我认为这不能让您轻松地将文本居中）。
新的 UIPickerViewDelegate 方法可让您返回属性字符串而不是普通字符串：
(NSAttributedString *)pickerView:(UIPickerView *)pickerView attributeTitleForRow:(NSInteger)row forComponent:(NSInteger)component
NSAttributedString UIKit 添加页面包含所有内容的列表您可以控制的角色属性：
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/NSAttributedString_UIKit_Additions/Reference/Reference.html#//apple_ref/doc/uid/TP40011688
Now with iOS 6 you can use NSAttributedStrings to customize the title text (though I don't think this lets you easily center the text).
A new UIPickerViewDelegate method lets you return an attributed string instead of a plain vanilla string:
(NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
The NSAttributedString UIKit additions page has a list of all the character attributes you can control:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/NSAttributedString_UIKit_Additions/Reference/Reference.html#//apple_ref/doc/uid/TP40011688