IOS学习之——ViewController之间正向传值

来源：互联网发布：2015最新癌症数据统计编辑：程序博客网时间：2024/06/01 07:24

下面定义两个页面，为了简单起见，就不添加Btton进行页面跳转，直接点击屏幕，触发

touchesBegan事件，进行页面跳转。

////  OneViewController.m//  双向传值////  Created by spare on 16/4/16.//  Copyright © 2016年 spare. All rights reserved.//#import "OneViewController.h"#import "TwoViewController.h"@interface OneViewController ()@property (weak, nonatomic) IBOutlet UITextField *textField1;@end@implementation OneViewController//点击屏幕任意位置，进入页面2-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{    //初始化将要进入的页面    TwoViewController *vc2=[[TwoViewController alloc]init];    //通过页面2定义的Content属性，将值传给页面2    vc2.content=self.textField1.text;    [self presentViewController:vc2 animated:YES completion:nil];    }- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view from its nib.}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end

#import <UIKit/UIKit.h>@interface TwoViewController : UIViewController

//页面1的对象不能直接访问页面2的textField属性//需要定义一个中间的变量值，将页面一的值保存在中间变量中@property(nonatomic,copy)NSString *content;@end

////  TwoViewController.m//  双向传值////  Created by spare on 16/4/16.//  Copyright © 2016年 spare. All rights reserved.//#import "TwoViewController.h"@interface TwoViewController ()@property (weak, nonatomic) IBOutlet UITextField *textField2;@end@implementation TwoViewController- (void)viewDidLoad {    [super viewDidLoad];    }//每次进入页面的时候，都去刷新获得的值-(void)viewWillAppear:(BOOL)animated{    //通过中间属性，传值给textField2；    self.textField2.text=self.content;}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end

0 0