来自 Plist 的多个数组

Question

<?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>
  <array>
    <string>Title 1</string>
    <string>Subtitle 1</string>
    <string>image1.png</string>
  </array>
  <array>
    <string>Title 2</string>
    <string>Subtitle 2</string>
    <string>image2.png</string>
  </array>
</array>
</plist>

这是我正在开发的应用程序的 Plist 文件。

我不确定如何使用许多数组的第一个字符串来创建一个包含所有标题的 NSMutableArray，然后再创建一个包含字幕和图像名称的 NSMutableArray。

我目前的解决方法是为每种类型的字符串创建 3 个单独的 Plist 文件，这可能会很麻烦。

Answer 1

要在保留 plist 数据结构的同时回答您的问题，您可以简单地执行以下操作：

NSArray *rootArray = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"your-plist" ofType:@"plist"]];
int numItems = [rootArray count];
NSMutableArray *titles = [NSMutableArray arrayWithCapacity:numItems];
NSMutableArray *subtitles = [NSMutableArray arrayWithCapacity:numItems];
NSMutableArray *images = [NSMutableArray arrayWithCapacity:numItems];

for (NSArray *itemData in rootArray) {
    [titles addObject:[itemData objectAtIndex:0]];
    [subtitles addObject:[itemData objectAtIndex:1]];
    [images addObject:[itemData objectAtIndex:2]];
}

但是，我建议您使用如下结构：

<?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>title</key>
    <string>Title 1</string>
    <key>subtitle</key>
    <string>Subtitle 1</string>
    <key>image</key>
    <string>image1.png</string>
  </dict>
  <dict>
    <key>title</key>
    <string>Title 2</string>
    <key>subtitle</key>
    <string>Subtitle 2</string>
    <key>image</key>
    <string>image2.png</string>
  </dict>
</array>
</plist>

此时您可以使用如下更明确的代码：

NSArray *rootArray = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"your-plist" ofType:@"plist"]];
int numItems = [rootArray count];
NSMutableArray *titles = [NSMutableArray arrayWithCapacity:numItems];
NSMutableArray *subtitles = [NSMutableArray arrayWithCapacity:numItems];
NSMutableArray *images = [NSMutableArray arrayWithCapacity:numItems];

for (NSDictionary *itemData in rootArray) {
    [titles addObject:[itemData objectForKey:@"title"]];
    [subtitles addObject:[itemData objectForKey:@"subtitle"]];
    [images addObject:[itemData objectForKey:@"image"]];
}