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

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()

}

}