摘要：
import UIKit class ViewController: UIViewController,UITextFieldDelegate{ var exampleTextField : UITextField! override func viewDidLoad() { super.viewD 阅读全文
摘要：
CAShapeLayer *shapeLayer = [CAShapeLayer layer]; [shapeLayer setBounds:self.view.bounds]; [shapeLayer setPosition:self.view.center]; [shapeLayer setFi 阅读全文