ios - 如何创建每日更新的 iOS 应用程序新闻

Question

<分区>

Answer 1

在你的 App Delegate 中，创建一个属性来保存一个 NSDictionary，你以后可以在你的应用程序的任何地方访问它(例如 UITableViewController)

AppDelegate.h:

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) NSDictionary *dictionary;

@end

AppDelegate.m:

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://foobar.com/news.plist"]];
    request.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;
    request.timeoutInterval = 5.0;

    [NSURLConnection sendAsynchronousRequest:request
                                       queue:[NSOperationQueue mainQueue]
                           completionHandler:
     ^(NSURLResponse *response, NSData *data, NSError *error)
     {
         if (data)
         {
             NSPropertyListFormat format;

             self.dictionary = [NSPropertyListSerialization propertyListWithData:data options:NSPropertyListImmutable format:&format error:nil];

            // Todo: post an NSNotification to any other view controllers telling them that we have the new data.

         }
         else
         {
             // Tell user connection failed
         }
     }];
}