将 UILabel 文本设置为粗体

如何在 Swift 中以编程方式将 UILabel的文本设置为粗体？到目前为止我的代码是:

    var label = UILabel(frame:theFrame)
label.text = "Foo"

ios
swift
uilabel

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小开

Use font property of UILabel:

label.font = UIFont(name:"HelveticaNeue-Bold", size: 16.0)

or use default system font to bold text:

label.font = UIFont.boldSystemFont(ofSize: 16.0)

小开

Use attributed string:

// Define attributes
let labelFont = UIFont(name: "HelveticaNeue-Bold", size: 18)
let attributes :Dictionary = [NSFontAttributeName : labelFont]


// Create attributed string
var attrString = NSAttributedString(string: "Foo", attributes:attributes)
label.attributedText = attrString

You need to define attributes.

Using attributed string you can mix colors, sizes, fonts etc within one text