问题描述
我已将本机框架 Redpark Serial SDK 1.0.5 转换为绑定库（名为：redparkBinding）并在我的一个项目中使用它。
我在演练中仔细遵循了每个步骤：Binding an iOS Objective-C Library redparkBinding 项目的构建结果成功。
但是，我面临一个奇怪的问题。应用程序在启动时崩溃（原因：NullReferenceException - 在 sdk 中有一个单例类，它总是为 null）。
更多细节：
我知道库本身按预期工作，因为它也用于本机 iOS 应用程序。我只是想弄清楚我的绑定项目配置中缺少什么。
这是与我的 .a 库关联的源 .h 文件：
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
// DEFAULT VALUES
// baudrate == 9600
// dataConfiguration == kDataConfig_8N1
// enableRtsCtsFlowControl == NO
// enableDtrDsrFlowControl == NO
// enableSoftwareFlowControl == NO
// dtr == FALSE
// rts == FALSE
enum SerialPortDataConfiguration
{
kDataConfig_8N1,// 8bit,no parity,one stop bit
kDataConfig_8O1,odd parity,one stop bit
kDataConfig_8E1,even parity,one stop bit
kDataConfig_7O1,// 7bit,one stop bit
kDataConfig_7E1,one stop bit
kDataConfig_8N2,two stop bits
kDataConfig_8O2,two stop bits
kDataConfig_8E2,two stop bits
};
@class RedSerialPort;
@protocol RedSerialPortDelegate <NSObject>
@optional
// called when serial port's transmit FIFO is empty
-(void) transmitFifoIsEmpty:(RedSerialPort *)thePort;
// called when any of the rx modem signals change state (CTS,DSR,DCD or RI)
// user can check value of each modem signal property to determine current state
// optionally,user can set an observer for the modem signal property interested in
- (void) modemSignalChange:(RedSerialPort *)thePort;
// called when TX or RX Flow Control state changes
- (void) flowControlStateChange:(RedSerialPort *)thePort flowControlIsHalted:(BOOL)isFlowHalted;
@end
@interface RedSerialPort : NSObject
{
}
@property (nonatomic,weak) id <RedSerialPortDelegate> delegate;
@property (readonly) BOOL cts;
@property (readonly) BOOL dsr;
@property (readonly) BOOL dcd;
@property (readonly) BOOL ri;
@property (nonatomic) BOOL dtr;
@property (nonatomic) BOOL rts;
@property (readonly) BOOL isFlowConbtrolHalted;
@property (nonatomic) int baudrate;
@property (nonatomic) enum SerialPortDataConfiguration dataConfiguration;
@property (nonatomic) BOOL enableRtsCtsFlowControl;
@property (nonatomic) BOOL enableDtrDsrFlowControl;
@property (nonatomic) BOOL enableSoftwareFlowControl;
// send NSData bytes over serial connection
// calls sendCompleteBlock when all bytes in the NSData are transferred from UART FIFO
-(BOOL)sendData:(NSData *)data sendDataComplete:(void (^)(void))sendCompleteBlock;
// post a read to the serial port
// recvCompleBlock is called when bytes are received
-(BOOL)recvData:(void (^)(NSData *))recvCompleteBlock;
/* =============================================================*/
enum
{
kFwUpdataComplete = 0,kFwUpdataInProgress = 1,kFwUpdataErasingSectors = 2,kFwUpdataRebootingDevice = 3,kFwUpdataBadAddress = 0x81,kFwUpdataVerifyFailed = 0x82,kFwUpdataWriteError = 0x83,kFwUpdataBadLength = 0x84,kFwUpdataFlashTimeout = 0x85
};
// Check if connected serial device has latest firmware
-(BOOL)isFirmwareCurrent;
// update serial device firmware to latest version
// updateProgressBlock will be called with firmare download progress
// progress is a value 0-100 indicating the percent of file downloaded.
// state = kFwUpdataInProgress - download is in progress.
// state = kFwUpdataComplete - download is complete and was successful
// state = kFwUpdataRebootingDevice - normal expected state during update
// state = kFwUpdataErasingSectors - normal expected state during update
// state = 0x8n - an error occurred during download and was stopped. Cable was not updated.
-(void)updateFirmware:(void (^)(int progress,uint8_t state))updateProgressBlock;
@end
@protocol RedSerialDeviceManagerDelegate <NSObject>
//
// called when a device is discovered
//
- (void) deviceDetected:(RedSerialPort *)thePort;
//
// called when device connection is broken,object is Now orphaned
//
- (void) devicedisconnected:(RedSerialPort *)thePort;
@end
@interface RedSerialDeviceManager : NSObject
{
}
@property (nonatomic,weak) id <RedSerialDeviceManagerDelegate> delegate;
// return singleton RedSerialDeviceManager
+ (RedSerialDeviceManager *)sharedManager;
// Call to enumerate connected device or register for notifications
// app should call this once at app launch
- (void) startdiscovery;
// application must call this when re-entering foreground to resume communication
// session with accessory
-(void) resume;
// called to clean up existing communication sessions with device
// app must call when going into background
- (void) stop;
@end
NS_ASSUME_NONNULL_END
这里是用sharpie创建的C#关联界面
using System;
using Foundation;
using ObjCRuntime;
namespace redparkLibrary
{
// @protocol RedSerialPortDelegate <NSObject>
[Protocol,Model(AutoGeneratedname = true)]
[BaseType(typeof(NSObject))]
interface RedSerialPortDelegate
{
// @optional -(void)transmitFifoIsEmpty:(RedSerialPort * _Nonnull)thePort;
[Export("transmitFifoIsEmpty:")]
void TransmitFifoIsEmpty(RedSerialPort thePort);
// @optional -(void)modemSignalChange:(RedSerialPort * _Nonnull)thePort;
[Export("modemSignalChange:")]
void ModemSignalChange(RedSerialPort thePort);
// @optional -(void)flowControlStateChange:(RedSerialPort * _Nonnull)thePort flowControlIsHalted:(BOOL)isFlowHalted;
[Export("flowControlStateChange:flowControlIsHalted:")]
void FlowControlStateChange(RedSerialPort thePort,bool isFlowHalted);
}
// @interface RedSerialPort : NSObject
[BaseType(typeof(NSObject))]
interface RedSerialPort
{
[Wrap("WeakDelegate")]
[NullAllowed]
RedSerialPortDelegate Delegate { get; set; }
// @property (nonatomic,weak) id<RedSerialPortDelegate> _Nullable delegate;
[NullAllowed,Export("delegate",ArgumentSemantic.Weak)]
NSObject WeakDelegate { get; set; }
// @property (readonly) BOOL cts;
[Export("cts")]
bool Cts { get; }
// @property (readonly) BOOL dsr;
[Export("dsr")]
bool Dsr { get; }
// @property (readonly) BOOL dcd;
[Export("dcd")]
bool Dcd { get; }
// @property (readonly) BOOL ri;
[Export("ri")]
bool Ri { get; }
// @property (nonatomic) BOOL dtr;
[Export("dtr")]
bool Dtr { get; set; }
// @property (nonatomic) BOOL rts;
[Export("rts")]
bool Rts { get; set; }
// @property (readonly) BOOL isFlowConbtrolHalted;
[Export("isFlowConbtrolHalted")]
bool IsFlowConbtrolHalted { get; }
// @property (nonatomic) int baudrate;
[Export("baudrate")]
int Baudrate { get; set; }
// @property (nonatomic) enum SerialPortDataConfiguration dataConfiguration;
[Export("dataConfiguration",ArgumentSemantic.Assign)]
SerialPortDataConfiguration DataConfiguration { get; set; }
// @property (nonatomic) BOOL enableRtsCtsFlowControl;
[Export("enableRtsCtsFlowControl")]
bool EnableRtsCtsFlowControl { get; set; }
// @property (nonatomic) BOOL enableDtrDsrFlowControl;
[Export("enableDtrDsrFlowControl")]
bool EnableDtrDsrFlowControl { get; set; }
// @property (nonatomic) BOOL enableSoftwareFlowControl;
[Export("enableSoftwareFlowControl")]
bool EnableSoftwareFlowControl { get; set; }
// -(BOOL)sendData:(NSData * _Nonnull)data sendDataComplete:(void (^ _Nonnull)(void))sendCompleteBlock;
[Export("sendData:sendDataComplete:")]
bool SendData(NSData data,Action sendCompleteBlock);
// -(BOOL)recvData:(void (^ _Nonnull)(NSData * _Nonnull))recvCompleteBlock;
[Export("recvData:")]
bool RecvData(Action<NSData> recvCompleteBlock);
// -(BOOL)isFirmwareCurrent;
[Export("isFirmwareCurrent")]
bool IsFirmwareCurrent { get; }
// -(void)updateFirmware:(void (^ _Nonnull)(int,uint8_t))updateProgressBlock;
[Export("updateFirmware:")]
void UpdateFirmware(Action<int,byte> updateProgressBlock);
}
// @protocol RedSerialDeviceManagerDelegate <NSObject>
[Protocol,Model(AutoGeneratedname = true)]
[BaseType(typeof(NSObject))]
interface RedSerialDeviceManagerDelegate
{
// @required -(void)deviceDetected:(RedSerialPort * _Nonnull)thePort;
[Abstract]
[Export("deviceDetected:")]
void DeviceDetected(RedSerialPort thePort);
// @required -(void)devicedisconnected:(RedSerialPort * _Nonnull)thePort;
[Abstract]
[Export("devicedisconnected:")]
void Devicedisconnected(RedSerialPort thePort);
}
// @interface RedSerialDeviceManager : NSObject
[BaseType(typeof(NSObject))]
interface RedSerialDeviceManager
{
[Wrap("WeakDelegate")]
[NullAllowed]
RedSerialDeviceManagerDelegate Delegate { get; set; }
// @property (nonatomic,weak) id<RedSerialDeviceManagerDelegate> _Nullable delegate;
[NullAllowed,ArgumentSemantic.Weak)]
NSObject WeakDelegate { get; set; }
// +(RedSerialDeviceManager * _Nonnull)sharedManager;
[Static]
[Export("sharedManager")]
RedSerialDeviceManager SharedManager { get; }
// -(void)startdiscovery;
[Export("startdiscovery")]
void Startdiscovery();
// -(void)resume;
[Export("resume")]
void Resume();
// -(void)stop;
[Export("stop")]
void Stop();
}
// @interface redparkBinding : NSObject
[BaseType(typeof(NSObject))]
interface redparkBinding
{
}
}
这是 .a 文件的 LinkWith 选项
[assembly: LinkWith("libredparkBinding.a”,SmartLink = true,ForceLoad = true)]
和 Makefile 文件：
XBUILD=/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild
PROJECT_ROOT=./redparkBinding
PROJECT=$(PROJECT_ROOT)/redparkBinding.xcodeproj
TARGET=redparkBinding
all: lib$(TARGET).a
lib$(TARGET)-arm64.a:
$(XBUILD) -project $(PROJECT) -target $(TARGET) -sdk iphoneos -arch arm64 -configuration Release clean build
-mv $(PROJECT_ROOT)/build/Release-iphoneos/lib$(TARGET).a $@
lib$(TARGET).a: lib$(TARGET)-arm64.a
xcrun -sdk iphoneos lipo -create -output $@ $^
clean:
-rm -f *.a *.dll
此外，我还在此处附上了所有必需的 files（本机库框架、本机库示例代码、绑定代码、SDK 用户指南）。
感谢来自社区的任何建议。
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@）