问题
How do you create a UILabel with this kind of text format? Would you use NSAttributedString?
回答1:
NSAttributedString can create text columns with tab stops. This is similar to how it is done in a word processor with the same limitations.
let text = "Name\t: Johny\nGender\t: Male\nAge\t: 25\nFavourites\t: Reading, writing"
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.tabStops = [NSTextTab(textAlignment: NSTextAlignment.Left, location: 150, options: [:])]
paragraphStyle.headIndent = 150
label.attributedText = NSAttributedString(string: text, attributes: [NSParagraphStyleAttributeName: paragraphStyle])
tabStops provides point positions for where to continue text after each tab. Here we did one tab at a reasonable point after the first column.
headIndent tells the label that wrapped text needs to be indented by a fixed amount, so it wraps to the next line.
The limitations with this approach are:
- The tab stop location is a fixed point value so you need to know what you want. If the value you pick is less than the width of the first column for some lines, those lines will indent to a different location.
- Wrapping only really works if your last column is the one that wraps. Since your second column was prefaced by ":" You may want to either just increase your
headIndentor also split out the ":" to be\t:\tand set up a second tab stop. If you're not letting text wrap, this is not an issue.
If these limitations are too restrictive, you can restructure your label to be a collection of multiple labels with auto layout constraints.
回答2:
In Swift 4.2 or above
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.tabStops = [NSTextTab.init(textAlignment: .left, location: 150, options: [:])]
paragraphStyle.headIndent = 150
let attributedTitle = NSAttributedString(string: "Some Title", attributes: [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 14.0), NSAttributedString.Key.paragraphStyle: paragraphStyle])
来源：https://stackoverflow.com/questions/31945333/nsattributedstring-with-tabs