gistfile1.m

void KTouchPointerWindowInstall();
void KTouchPointerWindowUninstall();

static BOOL installed;

void KTouchPointerWindowInstall()
{
    if (!installed) {
        installed = YES;
        Class _class = [UIWindow class];
        Method orig = class_getInstanceMethod(_class, sel_registerName("sendEvent:"));
        Method my = class_getInstanceMethod(_class, sel_registerName("k_sendEvent:"));
        method_exchangeImplementations(orig, my);
    }
}

void KTouchPointerWindowUninstall()
{
    if (installed) {
        installed = NO;
        Class _class = [UIWindow class];
        Method orig = class_getInstanceMethod(_class, sel_registerName("sendEvent:"));
        Method my = class_getInstanceMethod(_class, sel_registerName("k_sendEvent:"));
        method_exchangeImplementations(orig, my);
        NSArray *windows = [[UIApplication sharedApplication] windows];
        [windows makeObjectsPerformSelector:@selector(setNeedsDisplay)];
    }
}

@interface UIWindow (KTouchPointerWindow)

@end

@implementation UIWindow (KTouchPointerWindow)

-(void) k_sendEvent:(UIEvent *)event
{
    NSMutableSet *began = nil;
    NSMutableSet *moved = nil;
    NSMutableSet *ended = nil;
    NSMutableSet *cancelled = nil;
    for (UITouch *touch in [event allTouches]) {
        switch (touch.phase) {
            case UITouchPhaseBegan:
                if (!began) {
                    began = [NSMutableSet set];
                }
                [began addObject:touch];
                break;
            case UITouchPhaseEn....
            ...
            ...
        }
    }
    NSLog(@"event");
    [self k_sendEvent:event];
}

@end