Block多层嵌套导致对象不释放解决

@weakify(self);
 [self.customerViewModel loginCustomerLogicWithMobile:mobile  
                                                Password:password  
                                        NormalLoginBlock:^{  
                                            @strongify(self);  
                                              
                                            if ([self.customerViewModel getResponseStatus] == ZSYResponseSuccess) {  
                                                if (self.navigationController.presentingViewController != nil) {  
                                                    [self.navigationController dismissViewControllerAnimated:YES completion:nil];  
                                                } else {  
                                                    [self.navigationController popViewControllerAnimated:YES];  
                                                }  
                                            } else{  
                                                //设置手势密码失败、注册失败，停留在手势密码界面  
                                                self.buttonNext.enabled = YES;  
                                                [self.txtLoginPwd becomeFirstResponder];  
                                            }  
                                              
                                        } ForgetGesturePasswordBlock:^{  
        @strongify(self); 
                                       __block ZSYCustomerLoginViewController *point = self;//对指针retain一次</strong></span>  
                                            [CLLockVC showSettingLockVCInVC:self successBlock:^(CLLockVC *lockVC, NSString *pwd) {  
                                                  
                                                //保存手势密码到服务器  
                                                GesturePasswordBlock block = [point.customerViewModel saveGesturePasswordCallback];  
                                                block(mobile, pwd);  
                                                  
                                                //密码保存成功之后，退出手势密码界面  
                                                [CLLockVC dismiss:.3f Completion:nil];  
                                                point = nil;//对指针release一次，保持前后retainCount守恒  
                                            }];  
                                              
                                        } CreateGesturePasswordBlock:^{  
                                              
                                            [CLLockVC showSettingLockVCInVC:self successBlock:^(CLLockVC *lockVC, NSString *pwd) {  
                                                @strongify(self);  
                                                  
                                                //保存手势密码到服务器  
                                                GesturePasswordBlock block = [self.customerViewModel saveGesturePasswordCallback];  
                                                block(mobile, pwd);  
                                                  
                                                //密码保存成功之后，退出手势密码界面  
                                                [CLLockVC dismiss:.3f Completion:nil];  
                                            }];  
                                        }];