xcode - 在自动调整大小的标签中的单独行上显示 Swift 字符串数组

Question

我有一个通过 FMDB SQLite 结果填充的 Swift 字符串数组。该数组向控制台窗口打印 OK。我现在不想打印到控制台，而是希望数组中的字符串显示在自动调整大小标签 (tests_label) 中的单独行上。

对 XCode 来说只是略逊一筹，所以感谢您的耐心等待!

import UIKit

class ViewController: UIViewController {


    @IBOutlet weak var tests_label: UILabel!

    var databasePath = NSString()

    override func viewDidLoad() {
        super.viewDidLoad()

        let filemgr = NSFileManager.defaultManager()

        let dirPaths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)

        let docsDir = dirPaths[0] as! String

        databasePath = docsDir.stringByAppendingPathComponent("vmd_db.db")

        let myDatabase = FMDatabase(path: databasePath as String)

        if myDatabase.open(){

            var arrayData:[String] = []

            let query_lab_test = "SELECT lab_test FROM lab_test"

            let results_lab_test:FMResultSet? = myDatabase.executeQuery(query_lab_test, withArgumentsInArray: nil)

            while results_lab_test?.next() == true {

                if let resultString = results_lab_test?.stringForColumn("lab_test"){

                arrayData.append(resultString)

            }
        }
            var multiLineString = join("\u{0085}", arrayData)
            tests_label.text = multiLineString
            tests_label.numberOfLines = 0
            tests_label.lineBreakMode = NSLineBreakMode.ByWordWrapping
            tests_label.sizeToFit()
            //println(arrayData)
            myDatabase.close()
    }
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

Answer 1

您可以创建一个由换行符分隔的字符串，如下所示:

let string = array.joinWithSeparator("\u{0085}")

或者在 Swift 4 中:

let string = array.joined(separator: "\u{0085}")

然后只需将其分配给标签即可。对于 UILabel，您可能应该将 numberOfLines 设置为零并使用 sizeToFit() 或一些更复杂的方法调整它的大小。