擷取iOS裝置的安裝的app的目錄、、

1. #include <objc/runtime.h>
2. Class LSApplicationWorkspace_class = objc_getClass("LSApplicationWorkspace");
3. NSObject* workspace = [LSApplicationWorkspace_class performSelector:@selector(defaultWorkspace)];
4. NSLog(@"apps: %@", [workspace performSelector:@selector(allApplications)]);

//檢測裝置是否安裝了某個app

NSURL *instagramURL = [NSURL URLWithString:@"instagram://location?id=1"];

BOOL hasInstagram = [[UIApplication sharedApplication] canOpenURL:instagramURL];