Swift_UI_UILabel

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
       
        // 1.创建label
        var swiftLabel : UILabel = UILabel(frame: CGRectMake(50, 100, 150, 30))
        
        // 2.设置label的内容
        swiftLabel.text = "swiftLablel"
        
        // 3.设置label内容的颜色
        swiftLabel.textColor = UIColor.blueColor()
        
        // 4.设置label的背景颜色
        swiftLabel.backgroundColor = UIColor.greenColor()
        
        // 5.切圆角
        swiftLabel.layer.cornerRadius = 15
        swiftLabel.layer.masksToBounds = true
        
        // 6.设置居中
        swiftLabel.textAlignment = NSTextAlignment.Center;
        
        // 7.设置字的大小
        swiftLabel.font = UIFont.systemFontOfSize(10)
        
        // 8. 设置断行模式,单词断行
        swiftLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping
        
        // 9.设置行数,设置为0,如果文本框有足够的显示会全部显示
        swiftLabel.numberOfLines = 0
        
        // 10.将label加入到view
        self.view.addSubview(swiftLabel)
    }
}