Question

我的XMLAppDelegate.m文件中有以下代码：

- (void)applicationDidFinishLaunching:(UIApplication *)application {
    [self.window makeKeyAndVisible];

    self.products = [NSMutableArray array];
    XMLViewController *viewController = [[XMLViewController alloc] init];
    viewController.entries = self.products; // 2. Here my Array is EMPTY. Why?

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:productData]];
    self.XMLConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];

    NSAssert(self.XMLConnection != nil, @"Failure to create URL connection.");

    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}

- (void)handleLoadedXML:(NSArray *)loadedData {
    [self.products addObjectsFromArray:loadedData]; // 1. here I get my Data (works fine)

    XMLViewController *viewController = [[XMLViewController alloc] init];
    [viewController.tableView reloadData];
}

我标记了问题。是否有可能将加载的数据（loadedData）传递给applicationDidFinishLaunching：？

提前致谢..

Answer 1

你的handleLoadedXML被叫到哪里？如果您想将其传递给applicationDidFinishLaunching，您可以让handleLoadedXML返回该数组，然后您可以在applicationDidFinishLaunching中调用该方法。

修改

这样想：

你首先有这个：

- (void)applicationDidFinishLaunching:(UIApplication *)application { [self.window makeKeyAndVisible]; self.products = [NSMutableArray array]; XMLViewController *viewController = [[XMLViewController alloc] init]; viewController.entries = self.products; // 2. Here my Array is EMPTY. Why? NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:productData]]; self.XMLConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self]; NSAssert(self.XMLConnection != nil, @"Failure to create URL connection."); [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; }

请注意，您尚未设置self.products。它只是分配。

申请完成启动后，您有：

// say you have something like this - (NSArray *)didFinishParsing { return someArray; }

此方法在某处调用，然后调用下面的方法来设置self.products。直到现在，您的self.products已填充。

- (void)handleLoadedXML:(NSArray *)loadedData { [self.products addObjectsFromArray:loadedData]; // 1. here I get my Data (works fine) XMLViewController *viewController = [[XMLViewController alloc] init]; [viewController.tableView reloadData]; }

因此，如果您希望在self.products中填充applicationDidFinishLaunching，则需要调用applicationDidFinishLaunching中生成数组的方法，比如didFinishParsing，您可以执行此操作self.products = [self didFinishParsing];，然后就会设置。

iOS：如何将数据传递给applicationDidFinishLaunching：？

1 个答案: