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我有一个UINavigationBar标题，我想将所有字母大写，这样“单词”就变成了“单词”。

我想对这个导航栏中的按钮做同样的事情。

我想知道是否有类似 CSStext-transform:uppercase;属性的东西可以改变单词的视觉外观，但是一旦检索到它的值，它仍然返回它的原始值。

先感谢您

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3 回答 3

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这实际上比你想象的要简单。您可以使用 NSStringuppercaseString来实现这一点。

[myLabel setText:[myString uppercaseString]];

或者，更适合您的需求：

for (UIBarButtonItem *button in self.navigationItem.rightBarButtonItems) { //Your nag bar
    [button setTitle:[[button title] uppercaseString]];
}

编辑：字符串不改变的例子。

NSString *myString = @"hello";
NSString *mySecondString = @"world!";

UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithTitle:[myString uppercaseString] style:UIBarButtonItemStyleBordered target:self action:nil];
UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithTitle:[mySecondString uppercaseString] style:UIBarButtonItemStyleBordered target:self action:nil];
[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:item1,item2, nil]];

NSLog(@"%@ | %@",myString,mySecondString);//this will output the same as when it was originally created.
于 2012-12-07T09:57:44.997 回答
0

As using [myString uppercaseString] has the downside of returning an uppercase string (well, it is not actually a downside ..) and not the original string, one option would be to set a UILabel with an all-caps font (Copperplate is just an example of an all-caps font, you will likely find a better one): 

int height = navigationController.navigationBar.frame.size.height;
int width = navigationController.navigationBar.frame.size.width;

UILabel *navLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, width, height)];
navLabel.backgroundColor = [UIColor clearColor];
navLabel.textColor = [UIColor whiteColor];
navLabel.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5];
navLabel.font = [UIFont fontWithName:@"Copperplate" size:18];
navLabel.textAlignment = UITextAlignmentCenter;

self.navigationItem.titleView = navLabel;
于 2012-12-07T10:05:04.953 回答
0

有 ！

NSString *myLowercaseString = @"a lowercase string";
NSString *myUppercaseString = [myLowercaseString uppercaseString];

如果你NSLog (@"%@", myUppercaseString);，你会得到以下输出：

小写字符串

然后，您可以将按钮或导航栏的文本属性设置为您的字符串。

于 2012-12-07T09:57:51.537 回答