如何从.plist文件读取数据结构到NSArray

Question

我正在使用以下方法手动创建数据结构:

NSDictionary* league1 = [[NSDictionary alloc] initWithObjectsAndKeys: @"Barclays Premier League", @"name",
                 @"Premier League", @"shortname",
                 @"101", @"id", nil];
NSDictionary* league2 = [[NSDictionary alloc] initWithObjectsAndKeys: @"Coca-Cola Championship", @"name",
                 @"Championship", @"shortname",
                 @"102", @"id", nil];
NSDictionary* league3 = [[NSDictionary alloc] initWithObjectsAndKeys: @"Scottish Premier League", @"name",
                 @"SPL", @"shortname",
                 @"201", @"id", nil];
NSDictionary* league4 = [[NSDictionary alloc] initWithObjectsAndKeys: @"Champions League", @"name",
                 @"UCL", @"shortname",
                 @"501", @"id", nil];

contentArray = [[NSArray alloc] initWithObjects:

                [[NSDictionary alloc] initWithObjectsAndKeys: @"English", @"category", [[NSArray alloc] initWithObjects: league1, league2, nil], @"leagues", nil],
                [[NSDictionary alloc] initWithObjectsAndKeys: @"Scottish", @"category", [[NSArray alloc] initWithObjects: league3, nil], @"leagues", nil],
                [[NSDictionary alloc] initWithObjectsAndKeys: @"Tournaments", @"category", [[NSArray alloc] initWithObjects: league4, nil], @"leagues", nil],
                nil];

[league1 release];
[league2 release];
[league3 release];
[league4 release];

但是,我认为如果从文件中读取它会更好.所以我创建了leagues.plist文件,它具有以下结构:

<?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>category</key>
            <string>English</string>
            <key>leagues</key>
            <array>
                <dict>
                    <key>name</key>
                    <string>Barclays Premier League</string>
                    <key>shortname</key>
                    <string>Premier League</string>
                    <key>id</key>
                    <string>101</string>
                </dict>
                <dict>
                    <key>name</key>
                    <string>Coca-Cola Championship</string>
                    <key>shortname</key>
                    <string>Championship</string>
                    <key>id</key>
                    <string>102</string>
                </dict>
            </array>
        </dict>
        <dict>
            <key>category</key>
            <string>Scottish</string>
            <key>leagues</key>
            <array>
                <dict>
                    <key>name</key>
                    <string>Scottish Premier League</string>
                    <key>shortname</key>
                    <string>SPL</string>
                    <key>id</key>
                    <string>201</string>
                </dict>
            </array>
        </dict>
        <dict>
            <key>category</key>
            <string>Tournaments</string>
            <key>leagues</key>
            <array>
                <dict>
                    <key>name</key>
                    <string>Champions League</string>
                    <key>shortname</key>
                    <string>UCL</string>
                    <key>id</key>
                    <string>501</string>
                </dict>
            </array>
        </dict>
    </array>
</plist>

我如何读取此文件.我尝试了各种方法,但没有任何工作.我甚至不知道我是否正在寻找合适的文件位置.作为参考,我正在尝试以下方法:

NSString* errorDesc = nil;
NSPropertyListFormat format;
NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"league" ofType:@"plist"];
NSData* plistXML = [[NSFileManager defaultManager] contentsAtPath:plistPath];
contentArray = (NSArray*)[NSPropertyListSerialization
                                     propertyListFromData:plistXML
                                     mutabilityOption:NSPropertyListMutableContainersAndLeaves
                                     format:&format
                                     errorDescription:&errorDesc];

if (!contentArray) {
    NSLog(errorDesc);
    [errorDesc release];
}

要么

NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"league" ofType:@"plist"];
contentArray = [NSArray arrayWithContentsOfFile:plistPath];

要么

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];

NSString *fooPath = [documentsPath stringByAppendingPathComponent:@"leagues.plist"];
NSLog(fooPath);
contentArray = [NSArray arrayWithContentsOfFile:fooPath];
NSLog(@"%@",contentArray);

这最终让我完全疯了.请帮忙!

非常感谢你

Answer 1

NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"league" ofType:@"plist"];
contentDict = [NSDictionary dictionaryWithContentsOfFile:plistPath];

答案是正确的 - 你确定你的文件在应用程序中吗？您是否已将其添加到项目中,并检查它是否被复制到您的应用程序包中？如果没有,可能是文件未添加到您正在构建的目标中,如果您有多个目标,则很容易犯错误.