2020-07-02 1.更新最新SDK。 2.参试封装工具类，只初始化一次SDK方案，暂时解决SDK无法释放问题。

JLChen

2020-07-02 fac61655d3d255468491d0829c8814c0cf0a62dd

 ESVideoPhoneSDKZigbee/ESVideoPhoneSDKDemo/ZigBee/ESVideoMonitorViewController.m

@@ -15,6 +15,7 @@
#import <Photos/Photos.h>
#import "AudioSessionHelper.h"
#import "CBToast.h"
#import "ESVideo.h"

@interface ESVideoMonitorViewController ()<ESVideoPhoneDelegate>

@@ -397,6 +398,8 @@
#pragma SDK可视对讲 功能部分
-(void)initESVideo{
    //初始化中断，进入后台的tag
    _es = ESVideo.shareInstance.es;
    
    _playing = NO;
    _isSpeaking = NO;
    self.isInterrupt = NO;
@@ -412,13 +415,19 @@
            });
        };
        //门口机会有视频的长宽高，是固定的（暂时还不确定）
        _es = [[ESVideoPhone alloc]initESVideoPhoneWithFrame:CGRectMake(0, 57, APP_SCREEN_WIDTH, 211) delegate:self imagecallBack:snapImageCallback];
//        _es = [[ESVideoPhone alloc]initESVideoPhoneWithFrame:CGRectMake(0, 57, APP_SCREEN_WIDTH, 211) delegate:self imagecallBack:snapImageCallback];
        if (_es) {
            //判断视频渲染是否初始化成功，如果失败会走ESVideoPhoneDelegate方法
            if (_es.showView) {
//                for(UIView *view in [_es.showView subviews])
//                {
//                    [view removeFromSuperview];
//                }
                _es.delegate = self;
                ESVideo.shareInstance.snapImageCallback = snapImageCallback;
                _es.showView.backgroundColor = [UIColor whiteColor];
                [self.centerView addSubview:_es.showView];
                _es.showView.hidden = YES;
            }
        }else{
            NSLog(@"ESVideoPhone 初始化失败");
@@ -520,11 +529,12 @@
        [_es stopTalk];
        
        _es.delegate = nil;
        
        
        ESVideo.shareInstance.snapImageCallback = nil;
//        _es.showView.removeFromSuperview;
        
    }
    [_es freeSubClass];
 
//    [_es freeSubClass];
}

-(void)dealloc{
@@ -560,6 +570,10 @@
    }else if([phoneEventStr isEqual:@"EVT_Connected"]){
        [self speaker:nil];
        //           [_mCallOrAccept setTitle:@"通话中..." forState:UIControlStateNormal];
    }else if([phoneEventStr isEqual:@"EVT_MonitorConnected"]){
        _es.showView.hidden = NO;
        [self speaker:nil];
        //           [_mCallOrAccept setTitle:@"通话中..." forState:UIControlStateNormal];
    }else if([phoneEventStr  isEqual:@"EVT_HangUp"]){