一：iOS 8 以后可以通過<code>MobileCoreService</code> 的私有 API獲取 iOS 設(shè)備上安裝的所有應(yīng)用。（iOS11后失效）
會(huì)有審核被拒的風(fēng)險(xiǎn)，謹(jǐn)慎使用。

Class cls = NSClassFromString(@"LSApplicationWorkspace");
id s = [(id)cls performSelector:NSSelectorFromString(@"defaultWorkspace")];
NSArray *array = [s performSelector:NSSelectorFromString(@"allInstalledApplications")];
NSLog(@"================");
for (id item in array) {
    NSLog(@"%@",[item performSelector:NSSelectorFromString(@"applicationIdentifier")]);
    NSLog(@"%@",[item performSelector:NSSelectorFromString(@"bundleIdentifier")]);
    NSLog(@"%@",[item performSelector:NSSelectorFromString(@"bundleVersion")]);
    NSLog(@"%@",[item performSelector:NSSelectorFromString(@"shortVersionString")]);
}
NSLog(@"================");

二：利用URL schemes判斷手機(jī)是否安裝某app。

//判斷本地是否有淘寶App
NSURL * myURL_APP_A = [NSURL URLWithString:@"taobao://"];
if ([[UIApplication sharedApplication] canOpenURL:myURL_APP_A]) {
    NSLog(@"canOpenURL");
    [[UIApplication sharedApplication] openURL:myURL_APP_A];
}
else{
    NSLog(@"淘寶未安裝");
}

提醒下：iOS9需要設(shè)置白名單，大伙兒還要在plist設(shè)置。

URL schemes.png

部分URL schemes名單：https://www.zhihu.com/question/19907735