import UIKit

class ViewController: UIViewController,UITextFieldDelegate {

    var textField: UITextField!

    override func viewDidLoad() {

        super.viewDidLoad()

        //背景颜色

        self.view.backgroundColor = UIColor.whiteColor()

      //label

        let lable = UILabel(frame:CGRect(x: 10, y: 30, width: 200, height: 70))

        lable.backgroundColor = UIColor.blueColor()

        lable.font = UIFont(name: "HelveticaNeue-Bold", size:18)

        self.view.addSubview(lable)

        lable.textAlignment = NSTextAlignment.Center

        lable.textColor = UIColor.purpleColor()

        lable.shadowColor = UIColor.lightGrayColor()

        lable.shadowOffset = CGSize(width: -5, height: 5)

        lable.lineBreakMode = NSLineBreakMode.ByCharWrapping

        lable.adjustsFontSizeToFitWidth = true

        lable.highlighted = true

        lable.highlightedTextColor = UIColor.redColor()

        let mutableStr = NSMutableAttributedString(string: "我是中国人我骄傲")

        mutableStr.addAttribute(NSFontAttributeName, value: UIFont(name: "HelveticaNeue-Bold", size: 38)!, range: NSMakeRange(0,4))

        mutableStr.addAttribute(NSForegroundColorAttributeName, value: UIColor.grayColor(),

            range: NSMakeRange(0, 4))

        //设置文字背景颜色

        mutableStr.addAttribute(NSBackgroundColorAttributeName, value: UIColor.greenColor(),

            range: NSMakeRange(3,3))

        lable.attributedText = mutableStr

        //button

//        let button = UIButton(frame:CGRectMake(10, 150, 100, 30))

        let button:UIButton = UIButton(type:.ContactAdd)

        //设置按钮位置和大小

        button.frame = CGRectMake(10, 150, 100, 30)

        //设置按钮文字

        button.setTitle("按钮", forState:UIControlState.Normal)

        self.view.addSubview(button);

        button.setTitle("普通状态", forState:UIControlState.Normal) //普通状态下的文字

        button.setTitleColor(UIColor.redColor(),forState: .Normal) //普通状态下文字的颜色

        button.setTitleShadowColor(UIColor.greenColor(),forState:.Normal) //普通状态下文字阴影的颜色

        button.backgroundColor=UIColor.grayColor()

        button.setImage(UIImage(named:"icon1"),forState:.Normal)  //设置图标

        button.adjustsImageWhenHighlighted=false //使触摸模式下按钮也不会变暗

        button.adjustsImageWhenDisabled=false //使禁用模式下按钮也不会变暗

        button.setBackgroundImage(UIImage(named:"background1"),forState:.Normal)

         //不传递触摸对象（即点击的按钮）

        button.addTarget(self,action:#selector(ViewController.tapped),forControlEvents:.TouchUpInside)

        //    button.addTarget(self,action:#selector(tapped(_:)),forControlEvents:.TouchUpInside)

        // UITextField

         textField = UITextField(frame: CGRect(x: 30, y: 190, width: 160, height: 30))

        textField.borderStyle = UITextBorderStyle.RoundedRect

        self.view.addSubview(textField)

        textField.delegate = self

        textField.placeholder = "请输入用户名"

        textField.adjustsFontSizeToFitWidth = true //当文字超出文本框宽度时，自动调整文字大小

        textField.minimumFontSize = 14 //最小可缩小的字号

        textField.textAlignment = .Left //水平左对齐

        textField.contentVerticalAlignment = .Center  //垂直居中对齐

        //背景图片设置

//        textField.borderStyle = .None //先要去除边框样式

//        textField.background=UIImage(named:"background1");

        //清除按钮（输入框内右侧小叉） 

        textField.clearButtonMode=UITextFieldViewMode.WhileEditing  //编辑时出现清除按钮

        // UIImageView的使用

        let imageView = UIImageView(image: UIImage(named: "icon"))

        imageView.frame = CGRectMake(30, 230, 100, 100)

        self.view.addSubview(imageView)

        let tap111 = UITapGestureRecognizer(target: self, action:#selector(ViewController.tap))

       imageView.userInteractionEnabled = true

        imageView.addGestureRecognizer(tap111)

        //字符串使用

        //1 判断字符串是否为空

        let test1Str="111"

        let test1Str2:String = String("ssss");

        print("test1Str" + (test1Str.isEmpty ? "没有值" : "有值"))

        print("test1Str2" + (test1Str2.isEmpty ? "没有值" : "有值"))

        print("88737979879879")

         //数组的使用

        let array = ["1","2","3"]

        for item in array{

            print("------" + item);

        }

        //字典的使用

        let dict = ["1":"111","2":"222","3":"333"]

        let arr:NSMutableArray=NSMutableArray.init(capacity: 100);

        for key in dict.values{

            print(key)

            arr.addObject(key)

        }

        print(arr)

    }

    func tap(){

      print("++++++++++++11111111")

    }

//    传递触摸对象（即点击的按钮），需要在定义action参数时，方法名称后面带上冒号

    func tapped(button:UIButton){

        print(button.titleForState(.Normal))

    }

    //收起键盘

    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {

        textField.resignFirstResponder()

    }

    func textFieldShouldReturn(textField: UITextField) -> Bool

    {

        textField.resignFirstResponder()

        return true;

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

swift学习之label，button，imageView，字符串，数组，字典