无法从库中触发回调方法

如何解决无法从库中触发回调方法

我有一种方法，应该在连接BLE设备后立即调用。但由于某种原因，这没有发生。 有多个视图控制器首先都在其中完成工作，但是没有调用最后一个应更新标签的视图控制器，这称为realDataCallBackWithData。

这是 viewController.m 中未被调用的代码：

#import "ViewController.h"
#import "CRPC_300SDK.h"
#import "CRBlueToothManager.h"
#import "CRHeartLiveView.h"
#import "DataObject.h"
#import "IntervalGraph.h"
#import <VTO2Lib/VTO2Lib.h>
#import "VTBLEUtils.h"
#import "VTConnectViewController.h"

@interface ViewController ()<CRPC_300SDKDelegate,CRBlueToothManagerDelegate,VTO2CommunicateDelegate>
    - (void)viewDidLoad
{
    [super viewDidLoad];
    [VTO2Communicate sharedInstance].delegate = self;
}

#pragma mark -
#pragma mark VTO2Parser Update

//This is the method which when called should activate the realDataCallBackWithData method below.

- (void)readRealtimeData{
    if (self.deviceCom.sensorConnected == NO){
        NSLog(@"readRealtimeData NOT activated,sensor state %d",self.deviceCom.sensorConnected);
    }else if (self.deviceCom.sensorConnected == YES){
        
    NSLog (@"readRealtimeData activated");
    [[VTO2Communicate sharedInstance] beginGetRealData];
    }
}

// This is the method not being called:

-(void)realDataCallBackWithData:(NSData *)realData
{
    if (realData == nil){
        NSLog(@"error");
        return;
    }
    VTRealObject *rObj = [VTO2Parser parseO2RealObjectWithData:realData];
    u_char hr = rObj.hr;
    _spo2Label.text = [NSString stringWithFormat:@"%d",hr];
    NSLog(@"O2Ring HR = %hhu",hr);
    
    
}

供参考，这里是 VTO2Communicate.h ：

#import <Foundation/Foundation.h>
#import <CoreBluetooth/CoreBluetooth.h>
#import "VTO2Def.h"

@class VTFileToRead;
NS_ASSUME_NONNULL_BEGIN

@protocol VTO2CommunicateDelegate <NSObject>

@optional

- (void)serviceDeployed:(BOOL)completed;

/// @brief Common command send to peripheral,callback
/// @param cmdType command for VTCmdTypeSyncParam/VTCmdTypeSetFactory
/// @param result view the enum VTProCommonResult
- (void)commonResponse:(VTCmdType)cmdType andResult:(VTCommonResult)result;

/// @brief Send the current progress of reading
/// @param progress progress value
- (void)postCurrentReadProgress:(double)progress;

/// @brief Read file complete
/// @param fileData view model --- VTFileToRead
- (void)readCompleteWithData:(VTFileToRead *)fileData;

/// @brief get information complete . if infoData == nil,an error occurred
/// @param infoData information data nullable
- (void)getInfoWithResultData:(NSData * _Nullable)infoData;

/// @brief use  `parseO2RealObjectWithData` to parse realData.  if realData == nil,an error occurred.
/// @param realData  real data
- (void)realDataCallBackWithData:(NSData * _Nullable)realData;

/// @brief use `` to parse realPPG.  if realPPG == nil,an error occurred.
/// @param realPPG real PPG data
- (void)realPPGCallBackWithData:(NSData * _Nullable)realPPG;

/// @brief read current peripheral's rssi
/// @param RSSI rssi
- (void)updatePeripheralRSSI:(NSNumber *)RSSI;

@end

@interface VTO2Communicate : NSObject

/// @brief This peripheral is currently connected. Need to be set after connection
@property (nonatomic,strong) CBPeripheral *peripheral;

/// @brief current file been read or written
@property (nonatomic,strong) VTFileToRead *curReadFile;

/// @brief time out       ms
@property (nonatomic,assign) u_int timeout;

@property (nonatomic,assign) id<VTO2CommunicateDelegate> _Nullable delegate;

+ (VTO2Communicate *)sharedInstance;

- (void)readRSSI;

/// @brief Get information of peripheral. callback `getInfoWithResultData:`
- (void)beginGetInfo;

/// @brief Get real-time data. callback `realDataCallBackWithData:`
- (void)beginGetRealData;


/// @brief Restore factory. callback `commonResponse: andResult:`
- (void)beginFactory;

/// @brief get PPG data.
- (void)beginGetRealPPG;

/// @brief set params .  all type view struct  `VTParamType`  .  callback `commonResponse: andResult:`
/// @param paramType param type
/// @param paramValue param content/value
- (void)beginToParamType:(VTParamType)paramType content:(NSString *)paramValue;
 
/// @brief Download file from peripheral.   callback `readCompleteWithData:`  & `postCurrentReadProgress:`
/// @param fileName file's name
- (void)beginReadFileWithFileName:(NSString *)fileName;

@end


/// @brief this is a class to describe the completeed current loading or writing file
@interface VTFileToRead : NSObject

@property (nonatomic,assign) NSString *fileName;

@property (nonatomic,assign) u_int fileSize;

@property (nonatomic,assign) u_int totalPkgNum;

@property (nonatomic,assign) u_int curPkgNum;

@property (nonatomic,assign) u_int lastPkgSize;

/// @brief download completed response data .
@property (nonatomic,strong) NSMutableData *fileData;

/// @brief read file result
@property (nonatomic,assign) VTFileLoadResult enLoadResult;



@end


NS_ASSUME_NONNULL_END

和 VTO2Parser.h

#import <Foundation/Foundation.h>
#import "VTO2Info.h"
#import "VTO2Object.h"
#import "VTO2WaveObject.h"
#import "VTRealObject.h"

NS_ASSUME_NONNULL_BEGIN

@interface VTO2Parser : NSObject

/// @brief parse O2 information
/// @param infoData infoData from peripheral
+ (VTO2Info *)parseO2InfoWithData:(NSData * _Nonnull)infoData;

/// @brief parse O2 object
/// @param fileData fileData from peripheral
+ (VTO2Object *)parseO2ObjectWithData:(NSData * _Nonnull)fileData;

/// @brief parse O2 Wave array .
/// @param waveData waveData from  VTO2Object
+ (NSArray <VTO2WaveObject *>*)parseO2WaveObjectArrayWithWaveData:(NSData * _Nonnull)waveData;

/// @brief parse O2 Real-time data
/// @param realData realData from peripheral
+ (VTRealObject *)parseO2RealObjectWithData:(NSData *)realData;

/// @brief parse O2 Real PPG data
/// @param realPPG real PPG data from peripheral
+ (NSArray <VTRealPPG *>*)parseO2RealPPGWithData:(NSData *)realPPG;

@end

NS_ASSUME_NONNULL_END

其他所有内容都被调用，并且我已经在日志中确认了这一点，只有viewController.m中的方法没有触发，有人可以告诉我我哪里出错了吗？

解决方法

我发现解决此问题的方法是在外围设备连接后重新声明委托，我通过在readRealTimeData方法中添加以下代码行来做到这一点：

[VTO2Communicate sharedInstance].delegate = self;

这是现在可以使用的方法的外观：

- (void)readRealtimeData{
    if (self.deviceCom.sensorConnected == NO){
        NSLog(@"readRealtimeData NOT activated,sensor state %d",self.deviceCom.sensorConnected);
    }else if (self.deviceCom.sensorConnected == YES){
        
    NSLog (@"readRealtimeData activated");
    [VTO2Communicate sharedInstance].delegate = self;
    [[VTO2Communicate sharedInstance] beginGetRealData];
    }
}

这可以确保在触发回调之前重置代理。