iphone - 是否可以获取 iPhone 上安装的所有应用程序的信息？

Question

是否可以获取 iPhone/iPod 上已安装的所有应用程序的信息(应用程序图标、应用程序名称、应用程序位置)？

Answer 1

有一种方法可以检查应用程序是否已安装，但是，它确实违反了沙盒规则，Apple *可能会拒绝您的应用程序使用此功能。但 App Store 中提供的其他应用程序之前已经做过此操作，因此请随意尝试

有时，您可能想检查设备上是否安装了特定应用程序，以防您使用需要安装其他应用程序的自定义 URL 方案(然后您可以将某些按钮灰显/禁用)。不幸的是，苹果显然没有任何功能可以为你检查这一点，所以我快速创建了一个。它不会枚举每个应用程序，而是使用 MobileInstallation 缓存，该缓存始终与 SpringBoard 保持同步，并保存所有已安装应用程序的信息字典。尽管您“不应该”访问缓存，但 App Store 应用程序可以读取它。这是我的代码，至少可以在 Simulator 2.2.1 上完美运行:代码:

// Declaration
BOOL APCheckIfAppInstalled(NSString *bundleIdentifier); // Bundle identifier (eg. com.apple.mobilesafari) used to track apps

// Implementation

BOOL APCheckIfAppInstalled(NSString *bundleIdentifier)
{
    static NSString *const cacheFileName = @"com.apple.mobile.installation.plist";
    NSString *relativeCachePath = [[@"Library" stringByAppendingPathComponent: @"Caches"] stringByAppendingPathComponent: cacheFileName];
    NSDictionary *cacheDict = nil;
    NSString *path = nil;
    // Loop through all possible paths the cache could be in
    for (short i = 0; 1; i++)
    {

        switch (i) {
    case 0: // Jailbroken apps will find the cache here; their home directory is /var/mobile
        path = [NSHomeDirectory() stringByAppendingPathComponent: relativeCachePath];
        break;
    case 1: // App Store apps and Simulator will find the cache here; home (/var/mobile/) is 2 directories above sandbox folder
        path = [[NSHomeDirectory() stringByAppendingPathComponent: @"../.."] stringByAppendingPathComponent: relativeCachePath];
        break;
    case 2: // If the app is anywhere else, default to hardcoded /var/mobile/
        path = [@"/var/mobile" stringByAppendingPathComponent: relativeCachePath];
        break;
    default: // Cache not found (loop not broken)
        return NO;
        break; }

        BOOL isDir = NO;
        if ([[NSFileManager defaultManager] fileExistsAtPath: path isDirectory: &isDir] && !isDir) // Ensure that file exists
            cacheDict = [NSDictionary dictionaryWithContentsOfFile: path];

        if (cacheDict) // If cache is loaded, then break the loop. If the loop is not "broken," it will return NO later (default: case)
            break;
    }

    NSDictionary *system = [cacheDict objectForKey: @"System"]; // First check all system (jailbroken) apps
    if ([system objectForKey: bundleIdentifier]) return YES;
    NSDictionary *user = [cacheDict objectForKey: @"User"]; // Then all the user (App Store /var/mobile/Applications) apps
    if ([user objectForKey: bundleIdentifier]) return YES;

    // If nothing returned YES already, we'll return NO now
    return NO;
}

下面是一个示例，假设您的应用名为“yourselfmadeapp”并且是应用商店中的应用。代码:

NSArray *bundles2Check = [NSArray arrayWithObjects: @"com.apple.mobilesafari", @"com.yourcompany.yourselfmadeapp", @"com.blahblah.nonexistent", nil];
for (NSString *identifier in bundles2Check)
    if (APCheckIfAppInstalled(identifier))
        NSLog(@"App installed: %@", identifier);
    else
        NSLog(@"App not installed: %@", identifier);

日志输出:代码:

2009-01-30 12:19:20.250 SomeApp[266:20b] App installed: com.apple.mobilesafari 2009-01-30 12:19:20.254 SomeApp[266:20b] App installed: com.yourcompany.yourselfmadeapp 2009-01-30 12:19:20.260 SomeApp[266:20b] App not installed: com.blahblah.nonexistent

在使用之前先尝试一下，我认为 Apple 更改了 MobileInstallation.plist 的位置，如果您确实更改了它，请在实际设备而不是模拟器上尝试。祝你好运!

http://www.iphonedevsdk.com/forum/iphone-sdk-development/37103-finding-out-what-apps-installed.html

PK