iOS7 + customBackBarButton

gistfile1.mm

- (void)addCustomBackBarButton{
    UIImage *image = [UIImage imageNamed:@"back.png"];
    
    UIButton *leftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, image.size.width + 40, image.size.height)];
    [leftButton setImage:image forState:UIControlStateNormal];
    [leftButton setTitle:@"返回" forState:UIControlStateNormal];
    [leftButton addTarget:self action:@selector(onBack) forControlEvents:UIControlEventTouchUpInside];
    
    UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureRecognizerHandle:)];
    [recognizer setMinimumPressDuration:0.4f];
    [leftButton addGestureRecognizer:recognizer];
    
    UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];
    leftBarButtonItem.style = UIBarButtonItemStylePlain;
    
    if(SystemVersion >= 7.0){
        self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                           initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                           target:nil action:nil];
        negativeSpacer.width = -10;
        self.navigationItem.leftBarButtonItems = @[negativeSpacer, leftBarButtonItem];
    }else{
        self.navigationItem.leftBarButtonItem = leftBarButtonItem;
    }
}

- (void)longPressGestureRecognizerHandle:(UILongPressGestureRecognizer *)longPressGestureRecognizer {
    if (longPressGestureRecognizer.state != UIGestureRecognizerStateBegan)
        return;
    
    [self.navigationController popToRootViewControllerAnimated:YES];
}

-(void)onBack{
    [self.navigationController popViewControllerAnimated:YES];
}