libFLEX

Put the libFLEX.dylib to your jailbroken iOS Device's /Library/MobileSubstrate/DynamicLibraries folder, then you can use Flipboard/FLEX in any app.

TL;DR

Flipboard just open source FLEX (Flipboard Explorer), a set of in-app debugging and exploration tools for iOS development.

And it tell us we can use it learn from other app by code injection.

But the document just said : The code injection is left as an exercise for the reader.

I never do some job about Jailbreak development， how can I do it？

And I Read a blog introducing the way do it http://itony.me/774.html

So, Just Create a iOS Dynamic Project (I highly recommend use iOSOpenDev ), clone the FLEX library code and link it to your project( I highly recommend use cocoapods ), and copy the code below and paste to your project:

#import "libFlex.h"
#import <UIKit/UIKit.h>
#import "FLEXManager.h"
 
@implementation libFlex
 
- (id)init
{
    self = [super init];
    if (self) {
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(appLaunched:)
                                                     name:UIApplicationDidBecomeActiveNotification
                                                   object:nil];
    }
    return self;
}
 
- (void)appLaunched:(NSNotification *)notification
{
    NSLog(@"======================= libFlex dylib show ========================");
    
    [[FLEXManager sharedManager] showExplorer];
}
 
@end
 
static void __attribute__((constructor)) initialize(void)
{
    NSLog(@"======================= libFlex dylib initialize ========================");
    
    static libFlex *entrance;
    entrance = [[libFlex alloc] init];
}

Complie it and drop the libFLEX.dylib file to your jailbroken iOS Device's /Library/MobileSubstrate/DynamicLibraries folder. Pretty easy.