NSPropertyListSerialization 无法为表视图中的详细信息视图设置图像字符串 (iOS)

发布于 2024-12-18 10:54:51 字数 2299 浏览 1 评论 0原文

当我浏览表视图时，我无法保留数组的内容。我的意思是，当我单击表视图中的一行时，我将尝试从 PList 中提取详细信息视图的数据。这是我在 viewDidLoad 中的内容：

NSString *myfile = [[NSBundle mainBundle] pathForResource:@"MillersDeals" ofType:@"plist"];
NSError *error;
NSData *data = [NSData dataWithContentsOfFile:myfile options:0 error:&error];
self.dealsArray = [NSPropertyListSerialization propertyListWithData:data                                                            options:NSPropertyListMutableContainers format:NULL error:&error];
NSLog(@"%@", self.dealsArray);

现在我从未使用过 NSPropertyListSerialization ，直到早些时候我被建议将其作为问题的答案。我不确定它是否会产生一整套不同的问题，或者是否需要将其转换回字典或数组才能使用其中的信息。当我两次 NSLog 时它都会打印出我的 Plist 。在我写的 didSelectRowAtIndexPath 方法上（我尝试将 PList 中的“图像”传递到我在详细信息视图中设置的图像字符串中）：

DealsDetailViewController *dealsDetail = [[DealsDetailViewController alloc]initWithNibName:@"DealsDetailViewController" bundle:nil];
NSLog(@"%@", dealsArray);
dealsDetail.petImageString = [[NSString alloc]initWithString:[[[dealsArray objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"Image"]];

错误出现在 DealsDetail.petImageString 声明上。我设置的 DealsArray 的数据类型是否错误？

Plist 示例：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"   "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<array>
    <dict>
        <key>Description</key>
        <string>Here&apos;s the deal</string>
        <key>Image</key>
        <string>Frito-Lays-Jobs.png</string>
        <key>Name</key>
        <string>Frito-Lays</string>
        <key>Thumbnail</key>
        <string>dollars.png</string>
    </dict>
    <dict>
        <key>Description</key>
        <string>Here&apos;s the deal 2</string>
        <key>Image</key>
        <string>Frito-Lays-Jobs.png</string>
        <key>Name</key>
        <string>Frito-Lays 2</string>
        <key>Thumbnail</key>
        <string>dollars.png</string>
    </dict>
</array>

这只是示例（这就是为什么某些元素是相同的）。

原文

I'm having trouble holding on to the contents of an array as I go through a Table View. What I mean is that I have a PList that I'm trying to draw data from for a Detail View once I click on a row in a Table View. Here's what I have in viewDidLoad:

NSString *myfile = [[NSBundle mainBundle] pathForResource:@"MillersDeals" ofType:@"plist"];
NSError *error;
NSData *data = [NSData dataWithContentsOfFile:myfile options:0 error:&error];
self.dealsArray = [NSPropertyListSerialization propertyListWithData:data                                                            options:NSPropertyListMutableContainers format:NULL error:&error];
NSLog(@"%@", self.dealsArray);

Now I've never used NSPropertyListSerialization until earlier when I was suggested it as an answer to a question. I'm not sure if it creates a whole set of different issues or if it needs to be converted back to a Dictionary or Array before I can utilize the information within. It prints out my Plist ok when I NSLog it both times. on the didSelectRowAtIndexPath method I wrote this (I attempt to pass the 'image' from the PList into an Image String that I've set up in the Detail View):

DealsDetailViewController *dealsDetail = [[DealsDetailViewController alloc]initWithNibName:@"DealsDetailViewController" bundle:nil];
NSLog(@"%@", dealsArray);
dealsDetail.petImageString = [[NSString alloc]initWithString:[[[dealsArray objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"Image"]];

The error comes on the dealsDetail.petImageString declaration. Is it the wrong data type that I've set dealsArray to?

Sample of Plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"   "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<array>
    <dict>
        <key>Description</key>
        <string>Here's the deal</string>
        <key>Image</key>
        <string>Frito-Lays-Jobs.png</string>
        <key>Name</key>
        <string>Frito-Lays</string>
        <key>Thumbnail</key>
        <string>dollars.png</string>
    </dict>
    <dict>
        <key>Description</key>
        <string>Here's the deal 2</string>
        <key>Image</key>
        <string>Frito-Lays-Jobs.png</string>
        <key>Name</key>
        <string>Frito-Lays 2</string>
        <key>Thumbnail</key>
        <string>dollars.png</string>
    </dict>
</array>

It's just sample stuff (that's why some of the elements are the same).

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浮华 2024-12-25 10:54:51

您显示的这个 plist 是一个字典数组，而不是字典数组的数组。所以像这样的东西应该在你的 didSelectRowAtIndexPath 中工作：

DealsDetailViewController *dealsDetail = [[DealsDetailViewController alloc]initWithNibName:@"DealsDetailViewController" bundle:nil];

dealsDetail.petImageString = [[self.dealsArray objectAtIndex:indexPath.row] objectForKey:@"Image"];

This plist you showed is an array of dictionaries, not an array of an array of dictionaries. So something like this should work in your didSelectRowAtIndexPath:

DealsDetailViewController *dealsDetail = [[DealsDetailViewController alloc]initWithNibName:@"DealsDetailViewController" bundle:nil];

dealsDetail.petImageString = [[self.dealsArray objectAtIndex:indexPath.row] objectForKey:@"Image"];

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