Swift 几个简单控件及上传系统相册照片

import UIKit

class ViewController:
UIViewController, UITextFieldDelegate,
UIImagePickerControllerDelegate,
UINavigationControllerDelegate {
    let inputNameLabel =
UILabel()
    let inputNameTextField =
UITextField()
    let inputNameLoginButton =
UIButton()
    let photo =
UIImageView()
    
    
    override
func viewDidLoad() {
        super.viewDidLoad()

        //输入信息名称
        inputNameLabel.frame =
CGRect(x: 20, y:
50, width: 200, height:
20)
        inputNameLabel.text =
"Input Your Name"
        inputNameLabel.textColor =
UIColor.blueColor()
        inputNameLabel.font =
UIFont.systemFontOfSize(14)
        inputNameLabel.textAlignment =
NSTextAlignment.Left
        self.view.addSubview(inputNameLabel)
        
        //输入信息
        inputNameTextField.frame =
CGRect(x: 20, y:
90, width: 200, height:
30)
        inputNameTextField.placeholder =
" Please Input Your Name"
        inputNameTextField.font =
UIFont.systemFontOfSize(14)
        inputNameTextField.delegate =
self
        inputNameTextField.clipsToBounds =
true
        inputNameTextField.layer.cornerRadius =
5
        inputNameTextField.layer.borderWidth =
0.5
        inputNameTextField.layer.borderColor =
UIColor.grayColor().CGColor
        self.view.addSubview(inputNameTextField)
        
        //模拟登陆按钮
        inputNameLoginButton.frame =
CGRect(x: 20, y:
130, width: 200, height:
30)
        inputNameLoginButton.setTitle("Login Button", forState:
UIControlState.Normal)
        inputNameLoginButton.setTitleColor(UIColor.blueColor(),
forState: UIControlState.Normal)
        inputNameLoginButton.titleLabel?.font =
UIFont.systemFontOfSize(14)
        inputNameLoginButton.titleLabel?.textAlignment =
NSTextAlignment.Left
        inputNameLoginButton.addTarget(self, action:
#selector(ViewController.loginClike), forControlEvents:
UIControlEvents.TouchUpInside)
        self.view.addSubview(inputNameLoginButton)
        
        //照片
        photo.frame =
CGRect(x: 20, y:
180, width: 200, height:
200)
        photo.image =
UIImage(named: "img.jpg")
        //给照片加入点击事件 
点击可选择系统相册照片
        let choosePhoto:
UITapGestureRecognizer = UITapGestureRecognizer(target:
self, action: #selector (ViewController.chooseTap))
        photo.addGestureRecognizer(choosePhoto)
        photo.userInteractionEnabled =
true
        self.view.addSubview(photo)
        
    }
    
    func loginClike() -> () {
        print("Login Button Clike...")
        inputNameLabel.text =
"Change Input Your Name"
        photo.image =
UIImage(named: "img1.jpg")
        
    }
    
    func chooseTap() -> () {
        
        //创建UIImagePickerController
        let imagePicker =
UIImagePickerController()
        //类型
。。 相册
        imagePicker.sourceType = .PhotoLibrary
        imagePicker.delegate =
self//设置代理
        presentViewController(imagePicker, animated:
true, completion: nil)//跳转
        
    }

    //点击取消 
返回
    func imagePickerControllerDidCancel(picker:
UIImagePickerController) {
        dismissViewControllerAnimated(true, completion:
nil)
    }
    
    //选择完照片后的调用方法
    func imagePickerController(picker:
UIImagePickerController, didFinishPickingMediaWithInfo info: [String :
AnyObject]) {
        //拿到选择完的照片
        let selectedImage = info[UIImagePickerControllerOriginalImage]
as! UIImage
        //设置photo的照片
        photo.image = selectedImage
        //返回
        dismissViewControllerAnimated(true, completion:
nil)
     }
    
    override
func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}