1

我正在尝试将 SocketScan SDK 与用 Swift 编写的应用程序一起使用。使用桥接头，Objective-C 代码很容易导入。但是，在运行应用程序时，它在 onDeviceArrival 阶段崩溃，Xcode 引用了“无法识别的选择器”。也就是说，ScanApi 打开并运行，并且在设备到达时，应用程序崩溃并出现以下错误：

-[SocketConnect.ViewController onDeviceArrival:Device:]：无法识别的选择器发送到实例 0x15550e670 * 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[SocketConnect.ViewController onDeviceArrival:Device:]：无法识别的选择器发送到实例 0x15550e670”* First throw call stack: (0x185a9259c 0x1961e40e4 0x185a99664 0x185a96230 0x18599ab6c 0x1000b2798 0x1000b2148 0x1000b1e24 0x1000a2dc4 0x1000a2e0c 0x186966e18 0x185a4a8d8 0x185a4a588 0x185a47fd4 0x1859750a4 0x18eb175a4 0x18a2aa3c0 0x1000a6ae8 0x1000a6b28 0x196852a08) libc++abi.dylib: terminating with uncaught exception of type NSException

这是 API 提供的 onDeviceArrival 的代码片段。

-(SKTRESULT)handleDeviceArrival:(id<ISktScanObject>)scanObj{
SKTRESULT result=ESKT_NOERROR;
id<ISktScanDevice> scanDevice=[SktClassFactory createDeviceInstance:_scanApi];
NSString* name=[[scanObj Msg]DeviceName];
NSString* guid=[[scanObj Msg]DeviceGuid];
long type=[[scanObj Msg]DeviceType];

// create a new DeviceInfo object
DeviceInfo* deviceInfo=[[DeviceInfo alloc]init:scanDevice name:name type:type];

// open the scanner which means that we can now receive
// any event (such as DecodedData event) from this scanner
result=[scanDevice open:guid];

NSLog(@"!!!device connected!!!!");

if(SKTSUCCESS(result)){
NSLog(@"SKTSUCCESS!");
    if(_noDeviceText!=nil)
        [_deviceInfoList removeObjectForKey:_noDeviceText];

    // add the device info into the list
    [_deviceInfoList setValue:deviceInfo forKey:[NSString stringWithFormat:@"%@",scanDevice]];
    NSLog(@"device info added to list.");
}

// notify the ScanApiHelper user a scanner has connected to this host
NSLog(@"about to notify ScanApiHelper that the scanner has been connected.");

if(_delegate!=nil)
    NSLog(@"delegate is NOT nil");

   [_delegate onDeviceArrival:result Device:deviceInfo];
 NSLog(@"ScanApi has been notified");
enter code here`#if __has_feature(objc_arc)
#else 
[deviceInfo release];// we don't keep this object since we couldn't open the scanner
 NSLog(@"device info released");
#endif
return result;
}

日志打印所有内容，包括“代表不是零”。

有没有人在 Swift 环境中运行 SocketScan SDK 时遇到过问题，如果有，有什么建议可以解决这个问题吗？

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2 回答 2

1

我有同样的问题。对于委托函数 onDeviceArrival，选择器“Device”在 Swift 中是小写的。

将 ScanAPI/lib/ScanApiHelper.h (ScanApiHelperDelegate) 中的“设备”更改为“设备”为

-(void)onDeviceArrival:(SKTRESULT)result device:(DeviceInfo*)deviceInfo;

然后在函数handleDeviceArrival中更改ScanAPI/lib/ScanApiHelper.mm中的调用

[_delegate onDeviceArrival:result device:deviceInfo];

希望这可以帮助！

于 2014-12-04T14:47:33.787 回答
1

这是直接从 Socket Mobile 提供的修复程序，这也与 Mike 的回答一致。

ScanApiHelper.h

--- ScanApiHelper.h
+++ ScanApiHelper.h
@@ -70,7 +70,7 @@
  * @param result contains the result of the connection
  * @param newDevice contains the device information
  */
--(void)onDeviceArrival:(SKTRESULT)result Device:(DeviceInfo*)deviceInfo;
+-(void)onDeviceArrival:(SKTRESULT)result device:(DeviceInfo*)deviceInfo;

 /**
  * called each time a device disconnect from the host
@@ -113,7 +113,7 @@
  * the data has been decoded
  * @param decodedData contains the decoded data information
  */
--(void) onDecodedDataResult:(long) result Device:(DeviceInfo*) device DecodedData:(id<ISktScanDecodedData>) decodedData;
+-(void) onDecodedDataResult:(long) result device:(DeviceInfo*) device decodedData:(id<ISktScanDecodedData>) decodedData;

 // THIS IS THE PREVIOUS onDecodedData THAT WE KEEP FOR BACKWARD
 // COMPATIBILITY BUT THE BEST IS TO USE onDecodedDataResult THAT
@@ -125,6 +125,6 @@
  * the data has been decoded
  * @param decodedData contains the decoded data information
  */
--(void) onDecodedData:(DeviceInfo*) device DecodedData:(id<ISktScanDecodedData>) decodedData;
+-(void) onDecodedData:(DeviceInfo*) device decodedData:(id<ISktScanDecodedData>) decodedData;

 @end

ScanApiHelper.mm

--- ScanApiHelper.mm    
+++ ScanApiHelper.mm    
@@ -1658,7 +1658,7 @@

     // notify the ScanApiHelper user a scanner has connected to this host
     if(_delegate!=nil)
-        [_delegate onDeviceArrival:result Device:deviceInfo];
+        [_delegate onDeviceArrival:result device:deviceInfo];

 #if __has_feature(objc_arc)
 #else 
@@ -1790,14 +1790,14 @@
     result=[[scanObj Msg]Result];
     DeviceInfo* deviceInfo=[self getDeviceInfoFromScanObject:scanObj];
     if(_delegate!=nil){
-        if([_delegate respondsToSelector:@selector(onDecodedDataResult:Device:DecodedData:)]==YES){
-            [_delegate onDecodedDataResult:result Device:deviceInfo DecodedData:[[[scanObj Msg]Event]getDataDecodedData]];
+        if([_delegate respondsToSelector:@selector(onDecodedDataResult:device:decodedData:)]==YES){
+            [_delegate onDecodedDataResult:result device:deviceInfo decodedData:[[[scanObj Msg]Event]getDataDecodedData]];
         }
         else{
             // call only in case of no error the legacy onDecodedData:
             if(SKTSUCCESS(result)){
-                if([_delegate respondsToSelector:@selector(onDecodedData:DecodedData:)]==YES){
-                    [_delegate onDecodedData:deviceInfo DecodedData:[[[scanObj Msg]Event]getDataDecodedData]];
+                if([_delegate respondsToSelector:@selector(onDecodedData:decodedData:)]==YES){
+                    [_delegate onDecodedData:deviceInfo decodedData:[[[scanObj Msg]Event]getDataDecodedData]];
                 }
             }
         }
于 2014-12-04T20:55:34.287 回答