xamarin.ios - 应用程序在启动时关闭 - 适用于 Xamarin iOS 的 Redpark SDK 绑定

Question

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。

我仔细按照演练中的每个步骤：绑定 iOS Objective-C 库 RedparkBinding 项目的构建结果是成功的。

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 内部有一个始终为空的单例类）。

更多细节：

这发生在 DEBUG 和 RELEASE 模式中。
支持的架构是 ARM64
链接器行为：仅链接框架 SDK
本机 SDK 示例完美运行。

我知道库本身按预期工作，因为它也用于原生 iOS 应用程序。我只是想弄清楚我的 Binding 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,  // 8bit, odd parity, one stop bit
    kDataConfig_8E1,  // 8bit, even parity, one stop bit
    kDataConfig_7O1,  // 7bit, odd parity, one stop bit
    kDataConfig_7E1,  // 7bit, even parity, one stop bit
    kDataConfig_8N2,  // 8bit, no parity, two stop bits
    kDataConfig_8O2,  // 8bit, odd parity, two stop bits
    kDataConfig_8E2,  // 8bit, even parity, 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

这是用Sharpie创建的C#关联接口

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, Export("delegate", 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，我在此处附加了所有必需的文件（本机库框架、本机库示例代码、绑定代码、SDK 用户指南）。

我感谢社区的任何建议。

xamarin.ios - 应用程序在启动时关闭 - 适用于 Xamarin iOS 的 Redpark SDK 绑定

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