iOS － 单例传值 ／使用使用SharedApplication.进行传值（二）

1 使用SharedApplication,定义一个变量来传递.

2 使用文件plist，或者NSUserdefault来传递

3 通过一个单例的class来传递

4 通过Delegate来传递。

5  属性传值

6  数组，字典，数据库等

(1)AppDelegate.h

 #import <UIKit/UIKit.h>

 @interface AppDelegate : UIResponder <UIApplicationDelegate>

 @property (strong, nonatomic) UIWindow *window;

 @property (strong, nonatomic) NSString *name;//定义一个NSString的
 @property (strong, nonatomic) NSString *str;//定义一个NSString的

 @end

(2) ViewController.h

 #import "AppDelegate.h"
 #import "OneViewController.h"
 @interface ViewController : UIViewController

 @property (weak, nonatomic) IBOutlet UITextField *nameTextField;

 @property (weak, nonatomic) IBOutlet UITextField *qqTextfield;//输入框

 - (IBAction)go:(id)sender;//go按钮


 @end

 - (IBAction)go:(id)sender {

 //    使用AppDelegate得到当前输入的数据
     AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];
     appDelegate.str = self.qqTextfield.text ;
     appDelegate.name = self.nameTextField.text;


 //    进入下一页
     OneViewController *oneVC = [[OneViewController alloc]init];
     [self presentViewController:oneVC animated:YES completion:nil];


 }

(3) OneViewController.h

 #import <UIKit/UIKit.h>

 #import "AppDelegate.h"
 @interface OneViewController : UIViewController

 @property (weak, nonatomic) IBOutlet UITextField *aNameTextField;

 @property (weak, nonatomic) IBOutlet UITextField *oneTextField;



 @end

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     // Do any additional setup after loading the view from its nib.

 //    通过AppDelegate得到上一页输入的数据
     AppDelegate *appdelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
     self.oneTextField.text = appdelegate.str;
     self.aNameTextField.text = appdelegate.name;


 }

效果图：

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