I am trying to make a simple Coffee Calculator. I need to display the amount of coffee in grams. The "g" symbol for grams needs to be attached to my UILabel that I am using to display the amount. The numbers in the UILabel are changing dynamically with user input just fine, but I need to add a lower case "g" on the end of the string that is formatted differently from the updating numbers. The "g" needs to be attached to the numbers so that as the number size and position changes, the "g" "moves" with the numbers. I'm sure this problem has been solved before so a link in the right direction would be helpful as I've googled my little heart out.
I've searched through the documentation for an attributed string and I even downloded an "Attributed String Creator" from the app store, but the resulting code is in Objective-C and I am using Swift. What would be awesome, and probably helpful to other developers learning this language, is a clear example of creating a custom font with custom attributes using an attributed string in Swift. The documentation for this is very confusing as there is not a very clear path on how to do so. My plan is to create the attributed string and add it to the end of my coffeeAmount string.
var coffeeAmount: String = calculatedCoffee + attributedText
其中calculatedCoffee是一个Int转换为字符串和“attributedText”是小写的“g”与自定义字体，我试图创建。也许我做错了。任何帮助都是感激的!
Xcode 6版本:
let attriString = NSAttributedString(string:"attriString", attributes:
[NSForegroundColorAttributeName: UIColor.lightGrayColor(),
NSFontAttributeName: AttriFont])
Xcode 9.3版本:
let attriString = NSAttributedString(string:"attriString", attributes:
[NSAttributedStringKey.foregroundColor: UIColor.lightGray,
NSAttributedStringKey.font: AttriFont])
Xcode 10, iOS 12, Swift 4:
let attriString = NSAttributedString(string:"attriString", attributes:
[NSAttributedString.Key.foregroundColor: UIColor.lightGray,
NSAttributedString.Key.font: AttriFont])
斯威夫特3、4、5所示
使用下面的代码为文本颜色，字体，背景颜色和下划线/下划线颜色
let text = "swift is language"
let attributes = [NSAttributedString.Key.foregroundColor: UIColor.red, NSAttributedString.Key.backgroundColor: UIColor.blue,NSAttributedString.Key.font: UIFont.systemFont(ofSize: 25.0),NSAttributedString.Key.underlineColor: UIColor.white,NSAttributedString.Key.underlineStyle: NSUnderlineStyle.single.rawValue] as [NSAttributedString.Key : Any]
let textAttribute = NSAttributedString(string: text, attributes: attributes)
swiftLabel1.attributedText = textAttribute
我强烈建议使用带属性字符串的库。当你想要，例如，一个字符串有四种不同的颜色和四种不同的字体时，它使它变得更容易。这是我最喜欢的。它被称为SwiftyAttributes
如果你想用SwiftyAttributes创建一个有四种不同颜色和不同字体的字符串:
let magenta = "Hello ".withAttributes([
.textColor(.magenta),
.font(.systemFont(ofSize: 15.0))
])
let cyan = "Sir ".withAttributes([
.textColor(.cyan),
.font(.boldSystemFont(ofSize: 15.0))
])
let green = "Lancelot".withAttributes([
.textColor(.green),
.font(.italicSystemFont(ofSize: 15.0))
])
let blue = "!".withAttributes([
.textColor(.blue),
.font(.preferredFont(forTextStyle: UIFontTextStyle.headline))
])
let finalString = magenta + cyan + green + blue
finalString将显示为
