如何在UIBarItem中使用setTitleTextAttributes:forState？

Question

如何在setTitleTextAttributes:forState:中使用UIBarItem中的iOS

如何设置NSDictionary？不能让它工作，而文档对此并不十分清楚。

来自文档的：

setTitleTextAttributes:forState:

为给定的控件状态设置标题的文本属性：

- (void)setTitleTextAttributes:(NSDictionary *)attributes 
                      forState:(UIControlState)state

参数：

属性:包含文本属性的键值对的字典.可以使用NSString UIKit添加引用中列出的键指定字体、文本颜色、文本阴影颜色和文本阴影偏移量。

state:要为其设置标题文本属性的控件状态。

Answer 1

示例代码：

[[UIBarItem appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0], UITextAttributeTextColor, 
[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0], UITextAttributeTextShadowColor, 
[NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset, 
[UIFont fontWithName:@"AmericanTypewriter" size:0.0], UITextAttributeFont, nil] 
forState:UIControlStateNormal];

Answer 2

SWIFT5.0：

// Bar title text color
let shadow = NSShadow()
shadow.shadowColor = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
shadow.shadowOffset = CGSize(width: 0, height: 1)
let color : UIColor = UIColor(red: 220.0/255.0, green: 104.0/255.0, blue: 1.0/255.0, alpha: 1.0)
let titleFont : UIFont = UIFont(name: "AmericanTypewriter", size: 16.0)!

let attributes = [
    NSAttributedString.Key.foregroundColor : color,
    NSAttributedString.Key.shadow : shadow,
    NSAttributedString.Key.font : titleFont
]
self.navigationItem.rightBarButtonItem?.setTitleTextAttributes(attributes, for: .normal)

// Or you can use
UIBarItem.appearance().setTitleTextAttributes(attributes, for: .normal)

SWIFT4.0：

// Bar title text color
let shadow = NSShadow()
shadow.shadowColor = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
shadow.shadowOffset = CGSize(width: 0, height: 1)
let color : UIColor = UIColor(red: 220.0/255.0, green: 104.0/255.0, blue: 1.0/255.0, alpha: 1.0)
let titleFont : UIFont = UIFont(name: "AmericanTypewriter", size: 16.0)!

let attributes = [
        NSAttributedStringKey.foregroundColor : color,
        NSAttributedStringKey.shadow : shadow,
        NSAttributedStringKey.font : titleFont
    ]

self.navigationItem.rightBarButtonItem?.setTitleTextAttributes(attributes, for: UIControlState.normal)
// Or you can use
UIBarItem.appearance().setTitleTextAttributes(attributes, for: UIControlState.normal)

目标C代码：

NSShadow *shadow = [NSShadow new];
[shadow setShadowColor:[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0]];
[shadow setShadowOffset:CGSizeMake(0, 1)];

NSDictionary *attributes = @{
                                NSForegroundColorAttributeName: [UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0],
                                NSShadowAttributeName: shadow,
                                NSFontAttributeName: [UIFont fontWithName:@"AmericanTypewriter" size:16.0]
                             };

[self.navigationItem.rightBarButtonItem setTitleTextAttributes:attributes forState: UIControlStateNormal];

// Or you can use.

[[UIBarItem appearance] setTitleTextAttributes:attributes forState: UIControlStateNormal];

Answer 3

下面是phix23 23的代码，只是更新了语法，我认为语法更简洁：

[[UIBarItem appearance] setTitleTextAttributes:@{
                      UITextAttributeTextColor: [UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0],
                UITextAttributeTextShadowColor: [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0],
               UITextAttributeTextShadowOffset: [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],
                           UITextAttributeFont: [UIFont fontWithName:@"AmericanTypewriter" size:0.0]}
                                      forState: UIControlStateNormal];