ios 你如何在 UIBarItem 中使用 setTitleTextAttributes:forState ？
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How do you use setTitleTextAttributes:forState in UIBarItem?
提问by BeMyGuestPlease
How do you use setTitleTextAttributes:forState:in UIBarItemin iOS?
如何使用setTitleTextAttributes:forState:在UIBarItem中iOS？
How do you set the NSDictionary? Can't make it work and documentation isn't very clear about that.
你是怎么设置的NSDictionary？无法使其工作，并且文档对此不是很清楚。
From the documentation:
从文档：
setTitleTextAttributes:forState:
Sets the title's text attributes for a given control state:
为给定的控件状态设置标题的文本属性：
- (void)setTitleTextAttributes:(NSDictionary *)attributes
forState:(UIControlState)state
Parameters:
参数：
attributes: A dictionary containing key-value pairs for text attributes. You can specify the font, text color, text shadow color, and text shadow offset using the keys listed in NSString UIKit Additions Reference.
属性：包含文本属性键值对的字典。您可以使用 NSString UIKit Additions Reference 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。
state: The control state for which you want to set the text attributes for the title.
state：要为其设置标题文本属性的控件状态。
回答by Felix
Example code:
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];
回答by Kampai
Swift 5.0:
斯威夫特 5.0：
// 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)
Swift 4.0:
斯威夫特 4.0：
// 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)
Objective C code:
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];
回答by Shaheen Ghiassy
Here's phix23's code, just with an updated, and I think cleaner, syntax:
这是 phix23 的代码，只是更新了，我认为更简洁的语法：
[[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];
回答by Mike Mellor
[self.tabBarItem setTitleTextAttributes:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[UIColor whiteColor], nil] forKeys:[NSArray arrayWithObjects:UITextAttributeTextColor, nil]] forState:UIControlStateNormal];
回答by miniLV
Swift5set UIBarItemtitle color
Swift5设置UIBarItem标题颜色
let attributes = [
NSAttributedString.Key.foregroundColor : UIColor.orange,
NSAttributedString.Key.font : UIFont.systemFont(ofSize: 20)
]
vc.tabBarItem.setTitleTextAttributes(attributes, for: .normal)
