javascript - 使用 Phonegap 下载文件时 iOS 应用程序崩溃

Question

使用phonegap下载文件时，当互联网断开时 - 应用程序挂起并崩溃。我收到以下错误:

* 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因:“-[__NSCFDictionary setObject:forKey:]:尝试插入 nil 值(键:body)”* 首先抛出调用栈:(0x35b4c88f 0x33770259 0x35b4c789 0x35b4c7ab 0x35ab968b 0x56a7f 0x57f8d 0x34f9dc29 0x34ef56d9 0x34ef56a3 0x34f9ddfb 0x3189dcb5 0x318034b7 0x318031a3 0x318030d9 0x35b20ad3 0x35b20335 0x35b1f045 0x35aa24a5 0x35aa236d 0x3383d439 0x3327acd5 0x28d9f 0x28d6 0)终止调用抛出异常(lldb)

文件的下载逻辑:

if(isOnline){
            //  alert("DEVICE is ONLINE" + isOnline);
            try{
                filePath = globalPathNew + "/" +name+ "."+fExt;
                //     alert("SAVING VIDEO AT ------> " + filePath);


                document.getElementById('PB'+name).style.display = 'block';

                document.getElementById('P'+name+'L').innerHTML = '';

                document.getElementById('P'+name+'L').innerHTML = 'Downloading...';





                ftv.onprogress = function(progressEvent) {
                    console.log("In Progress video"+progressEvent.lengthComputable);
                    if (progressEvent.lengthComputable) {
                        //downloadcompleteStatus =  Math.round(100 * (progressEvent.loaded / progressEvent.total));
                        $("#P" + name + "Progress").text(Math.round(100 * (progressEvent.loaded / progressEvent.total)) + "%");
                        console.log("------progressEvent if video------->%"+Math.round(100 * (progressEvent.loaded / progressEvent.total)));
                    } else {
                        console.log("------progressEvent else------->%"+Math.round(100 * (progressEvent.loaded / progressEvent.total)));

                    }
                };


                fileObjAbort = ftv;
                //alert("Video FileObj"+JSON.stringify(fileObjAbort));

                ftv.download(
                             url,
                             filePath,
                             function(entry) {

                             // alert("download complete: " + entry.fullPath);
                             //                                      console.log('video entry.fullPath------'+entry.fullPath);
                             //                                      console.log('video filePath ----'+filePath);

                             changeIsdownloadStatus(filePath, name, 'video');

                             if(currElementId != '' && currElementId != '' && currElementId != ''){
                             detailPageView(currElementId,currElementtype,currElementcountNum);
                             }
                             var index = -1;

                             $.each(downloadList, function(key,tempItem){
                                    if(tempItem.elementId == elementId){
                                    index = key;

                                    }
                                    });

                            // alert("dw list"+JSON.stringify(downloadList));
                             if(index != -1){
                             delete downloadList[index];
                             downloadList.splice(index,1);
                             }
                             //alert("dw list after Video Splice \n"+JSON.stringify(downloadList));
                             findNextDownloadItem(name);


                             //  alert("DOWNLOADED ------> ");
                             if(currDownload == elementId){

                             //changeIsdownloadStatus(filePath,name, 'delete');

                             if(currElementId != '' && currElementId != '' && currElementId != ''){
                             detailPageView(currElementId,currElementtype,currElementcountNum);
                             }

                             }


                             console.log('*********************Video******************************');
                             console.log('-->delete element id:'+elementId);
                             console.log('deleteProgressindex Position:'+index);
                             console.log('-->before delete Length Array :'+downloadList.length);

                             console.log('-->before delete Length Array :'+downloadList.length);
                             console.log('***************************************************');


                             //                                      playMedia(filePath, name,'video');


                             // Code added
                           //bhavya  getFileSystemRefForWriting(jsonData);

                             deleteProgress(name,elementTitle,isDownloadedFlag,elementAudio,val,filePath);
                             // Code added
                             // getFileSystemRefForWriting(jsonData);

                             },
                             function(error) {
                             if(error.code != 4 || error.code != '4'){
                             //alert("Download Error");

                             jAlert('Download was not completed due to lost internet connection. Please connect to the Internet and re-download.', 'TT');
                             console.log("download error" + error.source);
                             //                                      console.log("download error source " + error.source);
                             //                                      console.log("download error target " + error.target);
                             //                                      console.log("upload error code" + error.code);
                             }
                             }
                             );

            }
            catch(error)
            {
                var txt="There was an error on this page.\n\n";
                txt+="Error description: " + err.message + "\n\n";
                txt+="Click OK to continue.\n\n";
                console.log('in catch block of video------>>>>'+txt);
            }


        }else{
            jAlert('Please go online to download file.', 'TT');
        }

当我断开互联网连接时，我应该收到以下错误:由于互联网连接丢失，下载未完成。请连接到互联网并重新下载。

当互联网关闭时，在 ma​​in.m 文件中切换到 Objective-C，并卡在这一行:

retVal为0，不执行NSLog行。

#import <UIKit/UIKit.h>

int main(int argc, char* argv[])
{
    @autoreleasepool {
        **int retVal = UIApplicationMain(argc, argv, nil, @"AppDelegate");**

        NSLog(@"RETURN VALUE ----->: %d ", retVal);

        return retVal;
    }
}

有人可以提出可能的原因吗？

谢谢，安基特·坦纳

Answer 1

以下是针对phonegap 2.5的修复

1. 转到 CordovaLib.xcodeproject
2. 导航至:类 > 命令 > CDVFileTransfer.m
3. 转到或搜索以下函数:- (NSMutableDictionary*)createFileTransferError
4. 在[result setObject:body forKey:@"body"];之前添加以下行if (body == nil) body = @"";
5. 瞧!你在那儿。

感谢我的同事:)

PS:这些错误和其他几个错误列在 iOS 版 Phonegap 的 Apache 页面上。