【iOS开发】swift 3.0 延长设置launch image启动页面图片显示时间

在ViewController.swift里面的viewDidLoad方法中添加代码（3.0为秒数，可自定义）：

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        Thread.sleep(forTimeInterval: 3.0)
    }

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view, typically from a nib.

Thread.sleep(forTimeInterval: 3.0)

}