属性传值
控制器一
import UIKit
classViewController:UIViewController{
overridefuncviewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.title="控制器1"
self.view.backgroundColor = UIColor.white
letbut =UIButton();
but.frame=CGRect.init(x:20,y:100,width:80,height:40);
but.backgroundColor = UIColor.yellow;
but.setTitle("切换", for:UIControlState.normal);
but.addTarget(self, action:#selector(buttonOneClicked), for:UIControlEvents.touchUpInside);
self.view.addSubview(but)
}
@objcfuncbuttonOneClicked(){
letv2 =ViewController2();
v2.str="2";
self.navigationController?.pushViewController(v2, animated:true);
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
控制器二
import UIKit
classViewController2:UIViewController{
var str =String()//创建一个属性，用来前后两个界面的传值
overridefuncviewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.red
self.title=self.str
// Do any additional setup after loading the view.
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
协议传值
视图控制器一
import UIKit
classViewController:UIViewController,transValue{
overridefuncviewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.title="控制器1"
self.view.backgroundColor = UIColor.white
letbut =UIButton();
but.frame=CGRect.init(x:20,y:100,width:80,height:40);
but.backgroundColor = UIColor.yellow;
but.setTitle("切换", for:UIControlState.normal);
but.addTarget(self, action:#selector(buttonOneClicked), for:UIControlEvents.touchUpInside);
self.view.addSubview(but)
}
@objcfuncbuttonOneClicked(){
letv2 =ViewController2();
v2.str="2";
v2.delegate=self;
self.navigationController?.pushViewController(v2, animated:true);
}
functransToFront(title:String) {
self.title= title
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
视图控制器二
import UIKit
//创建协议
protocoltransValue {
//反向传值
functransToFront(title:String)
}
classViewController2:UIViewController{
varstr =String()
//创建遵守协议的对象
vardelegate:transValue?
overridefuncviewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.red
self.title=self.str
// Do any additional setup after loading the view.
letbut =UIButton();
but.frame=CGRect.init(x:20,y:100,width:80,height:40);
but.backgroundColor = UIColor.yellow;
but.setTitle("切换", for:UIControlState.normal);
but.addTarget(self, action:#selector(buttonOneClicked), for:UIControlEvents.touchUpInside);
self.view.addSubview(but)
}
@objcfuncbuttonOneClicked(){
delegate?.transToFront(title:"改变")
self.navigationController?.popViewController(animated:true);
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
闭包(反向传值)
控制器一
import UIKit
classViewController:UIViewController{
overridefuncviewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.title="控制器1"
self.view.backgroundColor = UIColor.white
letbut =UIButton();
but.frame=CGRect.init(x:20,y:100,width:80,height:40);
but.backgroundColor = UIColor.yellow;
but.setTitle("切换", for:UIControlState.normal);
but.addTarget(self, action:#selector(buttonOneClicked), for:UIControlEvents.touchUpInside);
self.view.addSubview(but)
}
@objcfuncbuttonOneClicked(){
letv2 =ViewController2();
v2.changeTitle= { (title:String)in
self.title= title
}
self.navigationController?.pushViewController(v2, animated:true);
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
控制器二
import UIKit
//创建协议
protocoltransValue {
//反向传值
functransToFront(title:String)
}
classViewController2:UIViewController{
varstr =String()
//定义闭包并带有一个参数
varchangeTitle :((_title:String)->Void)?
overridefuncviewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.red
self.title=self.str
// Do any additional setup after loading the view.
letbut =UIButton();
but.frame=CGRect.init(x:20,y:100,width:80,height:40);
but.backgroundColor = UIColor.yellow;
but.setTitle("切换", for:UIControlState.normal);
but.addTarget(self, action:#selector(buttonOneClicked), for:UIControlEvents.touchUpInside);
self.view.addSubview(but)
}
@objcfuncbuttonOneClicked(){
changeTitle?("改变")
self.navigationController?.popViewController(animated:true);
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
通知
发送通知：NSNotificationCenter .defaultCenter().postNotificationName("NotificationCenter ", object: dict, userInfo: dict)
接受通知：NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(getMyName(_:)), name: "NotificationCenter", object: nil)
删除通知：NSNotificationCenter.defaultCenter().removeObserver(self)或者是NSNotificationCenter.defaultCenter().removeObserver(self, name: "NotificationCenter", object: nil)
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