IOS APP开发入门案例
1.创建新项目
2.设计布局,main.storyboard中,在控件库中
3.布局控件关联控制器
4.设置事件或者显示模式
5.编写代码:
import UIKit
class ViewController: UIViewController {
@IBAction func btn1(_ sender: UIButton) {
label1.text="我的第一个程序"
}
@IBOutlet weak var label1: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
@IBOutlet weak var hello: UILabel!
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
最后运行:
点击按钮改变label控件文字: