ios - 更改 UIBarButtonItem 文本字体大小和颜色

Question

我想知道如何更改 BarButtonItem 的文本字体？虽然我无法设置 setTitleTextAttributes

class TextfieldLogin : UITextField {

func INIT(){
    let numberToolbar = UIToolbar(frame: CGRectMake(0,0,320,50))
    numberToolbar.tintColor = UIColor.whiteColor()
    numberToolbar.barTintColor = UIColor(red: 155.0/255, green: 14.0/255, blue: 45.0/255, alpha: 1.0)

    numberToolbar.items = [
        UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil),
        UIBarButtonItem(title: "DONE", style: UIBarButtonItemStyle.Plain, target: self, action: "close"),
        UIBarButtonItem.setTitleTextAttributes([NSFontAttributeName : UIFont.systemFontOfSize(18.0),NSForegroundColorAttributeName : UIColor.redColor(),NSBackgroundColorAttributeName:UIColor.blackColor()],
            forState: UIControlState.Normal)        ]

    numberToolbar.sizeToFit()

    }
}

Answer 1

这是你要找的吗？

objective-C :

[buttonItem setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: 
[UIFont fontWithName:@"Helvetica-Bold" size:20.0], NSFontAttributeName,
[UIColor blackColor], NSForegroundColorAttributeName,
nil] forState:UIControlStateNormal];

swift :

let titleDict: NSDictionary = [NSFontAttributeName: "Helvetica-Bold"]
self.numberToolbar.titleTextAttributes = titleDict