ios - 如何对齐字符串中的 Logo

Question

当前代码允许我附加一个标志。像这样:

但是我怎样才能只对齐右边的“Logo”标志呢？

这就是我想要的:

let paragraph = NSMutableAttributedString()

                let font = UIFont(name: "Helvetica Neue", size: 15.0) ?? UIFont.systemFontOfSize(18.0)
                let align = NSTextAlignment.Center

                let textFont = [
                    NSFontAttributeName : font]


                let attrString1 = NSAttributedString(string: "\n Logo", attributes:textFont)
                let attrString2 = NSAttributedString(attributedString: textview.attributedText)


                paragraph.appendAttributedString(attrString2)
                paragraph.appendAttributedString(attrString1)

                let paraStyle = NSMutableParagraphStyle()

                paraStyle.alignment = .Center
                paraStyle.firstLineHeadIndent = 15.0
                paraStyle.paragraphSpacingBefore = 3.0


                paragraph.addAttribute(NSParagraphStyleAttributeName, value: paraStyle, range: NSRange(location: 0,length: paragraph.length))

                shareTextView.attributedText = paragraph

Answer 1

如果您希望不同部分采用不同的对齐方式，请为两种段落样式指定不同的范围。因此，您可以执行以下操作:

let centerStyle = NSMutableParagraphStyle()
centerStyle.alignment = .Center

let rightStyle = NSMutableParagraphStyle()
rightStyle.alignment = .Right

let font = UIFont(name: "Helvetica Neue", size: 24.0) ?? UIFont.systemFontOfSize(24.0)
let fontAttributes = [NSFontAttributeName : font]

let attributedText = NSMutableAttributedString(string: "Foo\nBar", attributes: fontAttributes)

attributedText.addAttribute(NSParagraphStyleAttributeName, value: centerStyle, range: NSRange(location: 0, length: 4))
attributedText.addAttribute(NSParagraphStyleAttributeName, value: rightStyle, range: NSRange(location: 4, length: 3))

textView.attributedText = attributedText

或者，更简单的是，您可以附加具有不同属性的属性字符串:

let font = UIFont(name: "Helvetica Neue", size: 24.0) ?? UIFont.systemFontOfSize(24.0)
let centerAttributes = [NSFontAttributeName : font, NSParagraphStyleAttributeName : centerStyle]
let attributedText = NSMutableAttributedString(string: "Foo\n", attributes: centerAttributes)

let rightAttributes = [NSFontAttributeName : font, NSParagraphStyleAttributeName : rightStyle]
attributedText.appendAttributedString(NSMutableAttributedString(string: "Bar", attributes: rightAttributes))

textView.attributedText = attributedText

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