Question

我正在使用故事板，我有一个加载动态按钮的视图。单击此按钮，我需要加载第二个视图控制器并传递数据。我不能使用segue作为其动态按钮。

我使用以下代码加载第二个视图控制器

UIStoryboard*  sb1 = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone"
                                                           bundle:nil];
UIViewController* vc1 = [sb1 instantiateViewControllerWithIdentifier:@"SecondViewController"];


[self.navigationController pushViewController:vc1 animated:YES];

在第二个视图控制器中，我需要从第一个视图控制器访问大约5个字段。我如何传递数据？

Answer 1

尝试类似的东西：

A类

// CLASS_A.h
#import <UIKit/UIKit.h>
@interface CLASS_A : UIViewController {
    ...
}
- (IBAction)Btn_PushPressed:(id)sender;
...
@end

// CLASS_A.m
#import "CLASS_A.h"
#import "CLASS_B.h"
@implementation CLASS_A

- (IBAction)Btn_PushPressed:(id)sender
{
    UIStoryboard*  sb1 = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone"
                                                       bundle:nil];
    CLASS_B* vc1 = [sb1 instantiateViewControllerWithIdentifier:@"SecondViewController"];
    vc1.delegate = self;
    [self.navigationController pushViewController:vc1 animated:TRUE];
}

....
@end

B类

// CLASS_B.h
#import <UIKit/UIKit.h>
@class CLASS_A;
@interface CLASS_B : UIViewController {
    ...
}
@property (weak, nonatomic) CLASS_A *delegate;
....
@end

// CLASS_B.m
#import "CLASS_B.h"
#import "CLASS_A.h"
@implementation CLASS_B
....
@end

Answer 2

你可以通过ctrl +从第一个控制器拖动到第二个控制器创建一个没有按钮的Segue（不要忘记给这个segue和标识符）。

下一步在按钮的IBAction中（通过Interface Builder或通过addTarget:self action:forControlEvents:设置），您可以调用[self performSegueWithIdentifier:@"YourSegueIdentifier" sender:button];

您可以像往常一样在- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

中将数据传递给第二个控制器

Answer 3

这是如何在Swift 2.0中完成的。而不是使用prepareForSegue，

Swift 3.0

let someViewConroller = self.storyboard?.instantiateViewController(withIdentifier: "SomeViewController") as! SomeViewController
someViewConroller.someObject = self.someObject!
self.navigationController?.pushViewController(someViewConroller, animated: true)

Swift 2.0

let someViewConroller = self.storyboard?.instantiateViewControllerWithIdentifier("SomeViewController") as! SomeViewController
someViewConroller.someObject = self.someObject!
self.navigationController?.pushViewController(someViewConroller, animated: true)

Answer 4

Swift 3

let destinationView = self.storyboard?.instantiateViewController(withIdentifier: "ID") as! ViewController2
destinationView.Value2 = Value1
self.present(destinationView, animated: true, completion: nil)

Answer 5

您只需使用

即可

NSUserDefaults的

存储数据并检索您需要的页面

在视图控制器A中

[[NSUserDefaults standardUserDefaults] setObject:aData forKey:@"DATA"];
[[NSUserDefaults standardUserDefaults] synchronize];

在目标控制器

中

NSData * aData = [[NSUserDefaults standardUserDefaults] valueForKey:@"DATA"];

Answer 6

首先你可以使用segue，即使你有动态按钮，只需将目标方法添加到UIButtons并在该方法中使用segue推送视图控制器。在第二个视图控制器中，在推送第二个视图控制器之前，先取几个属性并为这些属性赋值。像：

UIStoryboard*  sb1 = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone"
                                               bundle:nil];
UIViewController* vc2 = [sb1 instantiateViewControllerWithIdentifier:@"SecondViewController"];

[vc2 setName:@"name"];
[self.navigationController pushViewController:vc2 animated:YES];

之前，您需要在SecondViewController

中将属性赋值给NSString *名称

Answer 7

您可以定义协议：PassValueDelegate，并在第一个viewController中实现此协议。

UIStoryboard*  sb1 = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];
UIViewController* vc1 = [sb1 instantiateViewControllerWithIdentifier:@"SecondViewController"];
//set the delegate for the second view controller,so you can access the values in the first controller
vc1.delegate = self;
[self.navigationController pushViewController:vc1 animated:YES];

在没有segue的视图控制器之间传递数据

7 个答案: