如何将数据从AppDelegate传递到ViewController? [英] How to pass data from AppDelegate to ViewController?

问题描述

我正在使用Safari浏览网页.单击此页面上的按钮后，我的Ipad将启动我的应用程序.因此，我在AppDelegate.m中实现了方法- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url.

I'm using Safari to browse a webpage. After I click a button on this page, my Ipad will launch my app. So I implement the method - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url in the AppDelegate.m.

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url{
    if (!url) {  return NO; }   
    NSString *URLString = [url absoluteString];
    self.paramArray = [URLString componentsSeparatedByString:@"@"];
    NSLog(@"%d",[self.paramArray count]);
    for (int i = 1; i < [self.paramArray count]; i++) {
        NSLog([self.paramArray objectAtIndex:i]);
    }
    return YES;
}

我在网页上使用的网址是myapp://@first_part@second_part@third_part之类的东西. self.paramArray存储url的子字符串(myapp:// first_part second_part third_part).

The url I used on the webpage was some thing like myapp://@first_part@second_part@third_part. self.paramArray stores the substrings of url (myapp:// first_part second_part third_part).

现在，我想在我的ViewController的文本字段中显示这些字符串.如何将这个NSArray传递给ViewController?

Now I want to show these strings in the textfields in my ViewController. How can I pass this NSArray to the ViewController?

推荐答案

这只是完成它所需的几行代码.

This is just a few line of code, required to accomplish it.

将此行放入appDelegate.h文件中

Put this line in appDelegate.h file

首先，您需要遵循以下协议

First of all you need to conforms to a protocol as follow

@interface AppDelegate : UIResponder <UIApplicationDelegate>

现在需要声明一个属性供其使用，如下所示:

Now need to declare one property for it to use as follow

@property (strong, nonatomic) id<UIApplicationDelegate>delagete;

现在，在视图控制器中使用属性的最后一个步骤如下:

Now the last and final stage to use the property in view controller is as follow

在viewcontroller的.h文件中
首先放置对appdelegate的引用，例如#import "AppDelegate.h"
然后在@interface

In .h file of viewcontroller
First put reference to appdelegate like this #import "AppDelegate.h"
Then one iVar as AppDelegate *appDel; in @interface

.m文件中的文件
在视图中放入appDel = [[UIApplication sharedApplication]delegate];确实加载了方法，并在其中访问了appdelegate的all属性，例如appDel.paramArray.

Now in .m file
put appDel = [[UIApplication sharedApplication]delegate]; in view did load method and access the appdelegate's all property there like appDel.paramArray.

快乐编码:)

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