My iPhone 5 lock button is not working properly, so I wrote this application.
Since I want to lock the device, I need to be able to trigger the same functionality iOS does when the lock button is hit.
However, Apple does not play nice with its private frameworks. After some research, I found that I need to call the GSEventLockDevice() function which belongs to a private framework GraphicsServices.
The approach I take with this application is to dynamically load the lib and call this function. This is easily done using the dlopen and dlsym functions.
The code looks like this:
char *gsDylib = "/System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices";
void *handle = dlopen(gsDylib, RTLD_NOW);
if (handle) {
BOOL locked = FALSE;
void (*_GSEventLockDevice)() = dlsym(handle, "GSEventLockDevice");
if (_GSEventLockDevice) {
_GSEventLockDevice();
//...
}
dlclose(handle);
//...
}This application can obviously not be accepted (as is) on the Apple Store, and that's mostly why I put it here. If you want to use the application, you will need a developer cert (or a jailbroken device and using the iDevice build toolchain).
You can find me on twitter: @rgaucher