iOS UIWebView loading files in development

UIWebView There are two cases when loading a file in a real-world application,

1. Online preview is implemented,

2. Download to local, then view

If this is the first case:

1 nsurl *url = [Nsurl Urlwithstring:_url]; 2         Nsurlrequest *request = [[Nsurlrequest alloc] initwithurl:url]; 3         [Self.webview Loadrequest:request];

Loading the path directly is possible.

If this is the second case

1    NSData *data = [[NSData alloc] initwithcontentsoffile:_url]; 2 3         Nsurl *url = [Nsurl Fileurlwithpath:_url]; 4 5         [Self.webview loaddata:data mimetype:self. MIMEType textencodingname:@ "UTF8" Baseurl:url];

The principle is to load the local file using the encoded method

MIMEType is an extension,

Common MIME Types (generic): Hypertext Markup Language text. HTML text/htmlxml document. XML text/xmlxhtml document. XHTML application/xhtml+xml Plain text. txt text/ Plainrtf text. rtf application/rtfpdf document. PDF Application/pdfmicrosoft Word file. Word application/mswordpng image. png image/ Pnggif graphics. gif image/gifjpeg graphics. jpeg,.jpg Image/jpegau sound file. Au audio/basicmidi music file Mid,.midi audio/midi,audio/ X-midirealaudio music files. RA,. Ram audio/x-pn-realaudiompeg file. mpg,.mpeg Video/mpegavi file. avi video/x-msvideogzip file. gz Application/x-gziptar file. Tar application/x-tar arbitrary binary data application/octet-stream  more::  {". 323", "text/h323 "},{". 3gp "," VIDEO/3GPP "},{". AaB "," Application/x-authoware-bin "},{". Aam "," Application/x-authoware-map "},{". AAs " , "Application/x-authoware-seg"},{". Acx", "Application/internet-property-stream"},{". Ai", "Application/postscript "},{". AIF "," Audio/x-aiff "},{". aifc "," Audio/x-aiff "},{". Aiff "," Audio/x-aiff "},{". Als "," Audio/x-alpha5 "},{". am C "," Application/x-mpeg "},{". Ani "," Application/octet-stream "},{". apk ","Application/vnd.android.package-archive"},{". ASC", "Text/plain"},{". ASD", "Application/astound"},{". asf", "video /X-MS-ASF "},{". Asn "," Application/astound "},{". asp "," Application/x-asap "},{". Asr "," video/x-ms-asf "},{". asx "," VI DEO/X-MS-ASF "},{". Au "," audio/basic "},{". AvB "," Application/octet-stream "},{". avi "," Video/x-msvideo "},{". AWB "," a UDIO/AMR-WB "},{". Axs "," Application/olescript "},{". Bas "," Text/plain "},{". Bcpio "," Application/x-bcpio "},{". Bin ", "Application/octet-stream"},{". Bld", "Application/bld"},{". Bld2", "Application/bld2"},{". bmp", "Image/bmp"},{". bp K "," Application/octet-stream "},{". bz2 "," Application/x-bzip2 "},{". C "," Text/plain "},{". Cal "," Image/x-cals "},{". C At "," Application/vnd.ms-pkiseccat "},{". CCN "," APPLICATION/X-CNC "},{". Cco "," Application/x-cocoa "},{". CDF "," APPLICATION/X-CDF "},{". cer "," Application/x-x509-ca-cert "},{". CGI "," magnus-internal/cgi "},{". Chat "," Application /x-chat "},{". Class "," application/oCtet-stream "},{". CLP "," Application/x-msclip "},{". CMX "," IMAGE/X-CMX "},{". Co "," Application/x-cult3d-object "},{". Cod "," image/cis-cod "},{". conf "," Text/plain "},{". Cpio "," Application/x-cpio "},{". cpp "," Text/plain "},{". CPT "," AP Plication/mac-compactpro "},{". CRD "," Application/x-mscardfile "},{". CRL "," APPLICATION/PKIX-CRL "},{". Crt "," Application/x-x509-ca-cert "},{". Csh "," Application/x-csh "},{". CSM "," CHEMICAL/X-CSML "},{". Csml "," CHEMICAL/X-CSML "},{". css "," Text/css "},{". Cur "," Application/octet-stream "},{". DCM "," X-LML/X-EVM "},{". DCR "," Application/x-direc Tor "},{". Dcx "," IMAGE/X-DCX "},{". Der "," Application/x-x509-ca-cert "},{". DHTML "," text/html "},{". Dir "," Application /x-director "},{". dll "," Application/x-msdownload "},{". DMG "," Application/octet-stream "},{". DMs "," application/ Octet-stream "},{". Doc "," Application/msword "},{". docx "," application/ Vnd.openxmlformats-officedocument.wordprocessingml.document "},{". Dot "," Application/msword"},{". DVi "," Application/x-dvi "},{". DWF "," DRAWING/X-DWF "},{". dwg "," Application/x-autocad "},{". DXF "," Application /x-autocad "},{". DxR "," Application/x-director "},{". Ebk "," Application/x-expandedbook "},{". Emb "," chemical/ X-embl-dl-nucleotide "},{". Embl "," Chemical/x-embl-dl-nucleotide "},{". EPs "," Application/postscript "},{". epub "," Application/epub+zip "},{". Eri "," Image/x-eri "},{". Es "," Audio/echospeech "},{". ESL "," Audio/echospeech "},{". etc "," Application/x-earthtime "},{". Etx "," Text/x-setext "},{". Evm "," X-LML/X-EVM "},{". Evy "," Application/envoy "},{". exe " , "Application/octet-stream"},{". Fh4", "Image/x-freehand"},{". Fh5", "Image/x-freehand"},{". FHC", "Image/x-freehand "},{". Fif "," Application/fractals "},{". Flr "," X-world/x-vrml "},{". flv "," Flv-application/octet-stream "},{". FM "," a Pplication/x-maker "},{". fpx "," image/x-fpx "},{". Fvi "," Video/isivideo "},{". Gau "," Chemical/x-gaussian-input "},{". GCA "," application/x-gca-compressed "},{". GdB "," X-lml/x-gdb "},{". gif "," Image/gif "},{". GPs "," Application/x-gps "},{". Gtar "," Application/x-gtar "},{". Gz ", "Application/x-gzip"},{". H", "Text/plain"},{". HDF", "APPLICATION/X-HDF"},{". HdM", "Text/x-hdml"},{". Hdml", "text/x -hdml "},{". Hlp "," Application/winhlp "},{". hqx "," application/mac-binhex40 "},{". HTA "," Application/hta "},{". HTC "," Text/x-component "},{". htm "," text/html "},{". html "," text/html "},{". Hts "," text/html "},{". Htt "," text/webviewhtml " },{". Ice", "X-conference/x-cooltalk"},{". ico", "Image/x-icon"},{". Ief", "Image/ief"},{". IFM", "Image/gif"},{". IFS "," Image/ifs "},{". III "," Application/x-iphone "},{". Imy "," Audio/melody "},{". Ins "," Application/x-internet-signup " },{". IPs", "Application/x-ipscript"},{". IPX", "Application/x-ipix"},{". ISP", "Application/x-internet-signup"},{". It "," Audio/x-mod "},{". Itz "," Audio/x-mod "},{". IVR "," I-world/i-vrml "},{". j2k "," image/j2k "},{". Jad "," text/vnd.su N.j2me.app-descriptor "},{". Jam", "Application/x-jam"},{". Jar", "application/java-archive"},{". Java", "Text/plain"},{". Jfif", "Image/pipeg"} , {". Jnlp", "Application/x-java-jnlp-file"},{". Jpe", "Image/jpeg"},{". jpeg", "Image/jpeg"},{". jpg", "Image/jpeg"},{ ". Jpz", "Image/jpeg"},{". js", "Application/x-javascript"},{". Jwc", "APPLICATION/JWC"},{". Kjx", "APPLICATION/X-KJX" },{". Lak", "X-lml/x-lak"},{". Latex", "Application/x-latex"},{". LCC", "Application/fastman"},{". LCL", "application/ X-digitalloca "},{". LCR "," Application/x-digitalloca "},{". Lgh "," Application/lgh "},{". Lha "," application/ Octet-stream "},{". Lml "," X-lml/x-lml "},{". Lmlpack "," X-lml/x-lmlpack "},{". Log "," Text/plain "},{". Lsf "," Video/x-la -ASF "},{". LSx "," video/x-la-asf "},{". Lzh "," Application/octet-stream "},{". M13 "," Application/x-msmediaview "},{". M "," "Application/x-msmediaview"},{". M15", "Audio/x-mod"},{". m3u", "Audio/x-mpegurl"},{". M3url", "Audio/x-mpegurl" },{". m4a", "Audio/mp4a-latm"},{". M4B", "Audio/mp4a-latm"},{". m4p", "Audio/mp4a-latm"},{". M4u", "Video/vnd.mpegurl"},{". m4v", "video/x-m4v"},{". Ma1", "a Udio/ma1 "},{". Ma2 "," Audio/ma2 "},{". Ma3 "," Audio/ma3 "},{". Ma5 "," Audio/ma5 "},{". Man "," Application/x-troff-man "}, {". Map", "Magnus-internal/imagemap"},{". mbd", "Application/mbedlet"},{". MCT", "Application/x-mascot"},{". mdb", "AP Plication/x-msaccess "},{". Mdz "," Audio/x-mod "},{". Me "," Application/x-troff-me "},{". Mel "," Text/x-vmel "},{". mht ", "message/rfc822"},{". Mhtml", "message/rfc822"},{". Mi", "application/x-mif"},{". Mid", "Audio/mid"},{". Midi", "Audi O/midi "},{". MIF "," APPLICATION/X-MIF "},{". Mil "," Image/x-cals "},{". Mio "," Audio/x-mio "},{". MMF "," Application/x-sk t-lbs "},{". Mng "," Video/x-mng "},{". Mny "," Application/x-msmoney "},{". MoC "," Application/x-mocha "},{". Mocha "," Appl Ication/x-mocha "},{". MoD "," Audio/x-mod "},{". MoF "," Application/x-yumekara "},{". Mol "," Chemical/x-mdl-molfile "},{ ". Mop", "chemical/x-mopac-iNput "},{". mov "," Video/quicktime "},{". Movie "," Video/x-sgi-movie "},{". Mp2 "," Video/mpeg "},{". mp3 "," Audio/mpeg "}, {". mp4", "Video/mp4"},{". MPa", "Video/mpeg"},{". MPC", "Application/vnd.mpohun.certificate"},{". Mpe", "Video/mpeg"} , {". mpeg", "Video/mpeg"},{". mpg", "Video/mpeg"},{". Mpg4", "Video/mp4"},{". MPGA", "Audio/mpeg"},{". Mpn", "Applicat Ion/vnd.mophun.application "},{". MPP "," Application/vnd.ms-project "},{". MPs "," Application/x-mapserver "},{". Mpv2 " , "Video/mpeg"},{". MRL", "Text/x-mrml"},{". Mrm", "APPLICATION/X-MRM"},{". Ms", "Application/x-troff-ms"},{". Msg", " Application/vnd.ms-outlook "},{". MTS "," Application/metastream "},{". MTx "," Application/metastream "},{". Mtz "," Application/metastream "},{". Mvb "," Application/x-msmediaview "},{". Mzv "," Application/metastream "},{". Nar "," Application/zip "},{". Nbmp "," Image/nbmp "},{". NC "," APPLICATION/X-NETCDF "},{". Ndb "," X-lml/x-ndb "},{". Ndwn "," appli Cation/ndwn "},{". Nif "," application/x-nif"},{". Nmz "," Application/x-scream "},{". Nokia-op-logo "," Image/vnd.nok-oplogo-color "},{". Npx "," application/ X-NETFPX "},{". Nsnd "," audio/nsnd "},{". NVA "," APPLICATION/X-NEVA1 "},{". NWS "," message/rfc822 "},{". Oda "," applicatio N/oda "},{". Ogg "," Audio/ogg "},{". Oom "," Application/x-atlasmate-plugin "},{". P10 "," Application/pkcs10 "},{". P12 "," APPLICATION/X-PKCS12 "},{". p7b "," Application/x-pkcs7-certificates "},{". p7c "," Application/x-pkcs7-mime "},{". p7m " , "Application/x-pkcs7-mime"},{". p7r", "Application/x-pkcs7-certreqresp"},{". P7s", "application/x-pkcs7-signature "},{". Pac "," Audio/x-pac "},{". Pae "," Audio/x-epac "},{". Pan "," Application/x-pan "},{". PBM "," Image/x-portable-bitma P "},{". pcx "," image/x-pcx "},{". PDA "," IMAGE/X-PDA "},{". pdb "," chemical/x-pdb "},{". pdf "," Application/pdf "},{". PF R "," APPLICATION/FONT-TDPFR "},{". pfx "," APPLICATION/X-PKCS12 "},{". PGM "," Image/x-portable-graymap "},{". Pict "," Image/x-pict "},{". Pko "," application/ynd.ms-pKipko "},{". PM "," Application/x-perl "},{". PMA "," Application/x-perfmon "},{". PMC "," Application/x-perfmon "},{". PMD " , "APPLICATION/X-PMD"},{". PML", "Application/x-perfmon"},{". PMR", "Application/x-perfmon"},{". PMW", "application/ X-perfmon "},{". png "," Image/png "},{". PNM "," Image/x-portable-anymap "},{". Pnz "," Image/png "},{". Pot, "," Application /vnd.ms-powerpoint "},{". ppm "," Image/x-portable-pixmap "},{". pps "," Application/vnd.ms-powerpoint "},{". ppt "," Application/vnd.ms-powerpoint "},{". pptx "," application/ Vnd.openxmlformats-officedocument.presentationml.presentation "},{". Pqf "," Application/x-cprplayer "},{". Pqi "," Application/cprplayer "},{". PRC "," APPLICATION/X-PRC "},{". PRF "," Application/pics-rules "},{". Prop "," Text/plain "}, {". Proxy", "Application/x-ns-proxy-autoconfig"},{". PS", "Application/postscript"},{". Ptlk", "Application/listenup "},{". Pub "," Application/x-mspublisher "},{". Pvx "," Video/x-pv-pvx "},{". Qcp "," Audio/vnd.qcelp "},{". Qt "," VIdeo/quicktime "},{". Qti "," Image/x-quicktime "},{". Qtif "," Image/x-quicktime "},{". r3t "," Text/vnd.rn-realtext3d "}, {". Ra", "Audio/x-pn-realaudio"},{". Ram", "Audio/x-pn-realaudio"},{". rar", "Application/octet-stream"},{". Ras", "im Age/x-cmu-raster "},{". RC "," Text/plain "},{". RDF "," Application/rdf+xml "},{". RF "," Image/vnd.rn-realflash "},{". RGB "," Image/x-rgb "},{". Rlf "," Application/x-richlink "},{". Rm "," Audio/x-pn-realaudio "},{". Rmf "," AUDIO/X-RMF "},{". RM I "," Audio/mid "},{". Rmm "," Audio/x-pn-realaudio "},{". rmvb "," Audio/x-pn-realaudio "},{". Rnx "," application/ Vnd.rn-realplayer "},{". Roff "," Application/x-troff "},{". RP "," Image/vnd.rn-realpix "},{". rpm "," audio/ X-pn-realaudio-plugin "},{". Rt "," Text/vnd.rn-realtext "},{". Rte "," X-lml/x-gps "},{". rtf "," Application/rtf "},{". RT G "," Application/metastream "},{". Rtx "," Text/richtext "},{". RV "," Video/vnd.rn-realvideo "},{". RWC "," application/ X-rogerwilco "},{". s3m "," Audio/x-mod "},{". s3z "," audio/x-mod "},{". SCA "," Application/x-supercard "},{". ScD "," Application/x-msschedule "},{". SCT "," Text/scriptlet "},{". S DF "," Application/e-score "},{". Sea "," Application/x-stuffit "},{". Setpay "," Application/set-payment-initiation "},{ ". SetReg", "Application/set-registration-initiation"},{". SGM", "TEXT/X-SGML"},{". SGML", "TEXT/X-SGML"},{". Sh", " Application/x-sh "},{". Shar "," Application/x-shar "},{". shtml "," magnus-internal/parsed-html "},{". Shw "," Application/presentations "},{". Si6 "," Image/si6 "},{". Si7 "," Image/vnd.stiwap.sis "},{". Si9 "," image/vnd.lgtwap.sis "},{". Sis "," Application/vnd.symbian.install "},{". Sit "," Application/x-stuffit "},{". SKD "," Application/x-koan "},{ ". SKM", "Application/x-koan"},{". SKP", "Application/x-koan"},{". Skt", "Application/x-koan"},{". SLC", "application/ X-salsa "},{". SMD "," AUDIO/X-SMD "},{". Smi "," Application/smil "},{". Smil "," Application/smil "},{". SMP "," Application /studiom "},{". Smz "," Audio/x-smd "},{". snd "," AuDio/basic "},{". SPC "," Application/x-pkcs7-certificates "},{". Spl "," Application/futuresplash "},{". Spr "," Application/x-sprite "},{". Sprite "," Application/x-sprite "},{". SDP "," APPLICATION/SDP "},{". SPT "," application/ X-SPT "},{". Src "," Application/x-wais-source "},{". SST "," Application/vnd.ms-pkicertstore "},{". Stk "," application/ Hyperstudio "},{". StL "," Application/vnd.ms-pkistl "},{". stm "," text/html "},{". svg "," Image/svg+xml "},{". Sv4cpio "," Application/x-sv4cpio "},{". Sv4crc "," APPLICATION/X-SV4CRC "},{". SVF "," Image/vnd "},{". svg "," Image/svg+xml "},{". SV H "," IMAGE/SVH "},{". Svr "," X-world/x-svr "},{". SwF "," Application/x-shockwave-flash "},{". SWFL "," application/ X-shockwave-flash "},{". T "," Application/x-troff "},{". Tad "," Application/octet-stream "},{". Talk "," Text/x-speech "} , {". Tar", "Application/x-tar"},{". Taz", "Application/x-tar"},{". TBP", "Application/x-timbuktu"},{". TBT", "applicat Ion/x-timbuktu "},{". Tcl "," Application/x-tcl "},{". Tex ", "Application/x-tex"},{". Texi", "Application/x-texinfo"},{". Texinfo", "Application/x-texinfo"},{". tgz", " Application/x-compressed "},{". tHM "," Application/vnd.eri.thm "},{". tif "," Image/tiff "},{". Tiff "," Image/tiff "},{". Tki "," application/x-tkined "},{". tkined "," application/x-tkined "},{". ToC "," Application/toc "},{". Toy "," Image/toy " },{". Tr", "Application/x-troff"},{". trk", "X-lml/x-gps"},{". TRM", "Application/x-msterminal"},{". Tsi", "AUDIO/TSPL Ayer "},{". Tsp "," application/dsptype "},{". TSV "," Text/tab-separated-values "},{". Ttf "," Application/octet-stream "} , {". Ttz", "Application/t-time"},{". txt", "Text/plain"},{". Uls", "Text/iuls"},{". Ult", "Audio/x-mod"},{". Ustar", " Application/x-ustar "},{". Uu "," Application/x-uuencode "},{". Uue "," Application/x-uuencode "},{". VCD "," application/ X-cdlink "},{". vcf "," Text/x-vcard "},{". Vdo "," Video/vdo "},{". Vib "," Audio/vib "},{". Viv "," Video/vivo "},{". Vivo ", "Video/vivo"},{". Vmd", "Application/vocaLtec-media-desc "},{". VMF "," Application/vocaltec-media-file "},{". VMI "," Application/x-dreamcast-vms-info "},{". VMs "," Application/x-dreamcast-vms "},{". Vox "," Audio/voxware "},{". Vqe "," Audio/x-twinvq-plugin "},{". Vqf "," audio/ X-twinvq "},{". Vql "," Audio/x-twinvq "},{". Vre "," X-world/x-vream "},{". Vrml "," X-world/x-vrml "},{". VRT "," x-world/x- VRT "},{". Vrw "," X-world/x-vream "},{". VTs "," Workbook/formulaone "},{". wav "," Audio/x-wav "},{". Wax "," audio/x-ms-wax "},{". Wbmp "," Image/vnd.wap.wbmp "},{". WCM "," Application/vnd.ms-works "},{". wdb "," Application/vnd.ms-works "},{". W EB "," Application/vnd.xara "},{". wi "," Image/wavelet "},{". Wis "," Application/x-installshield "},{". Wks "," Application/vnd.ms-works "},{". Wm "," VIDEO/X-MS-WM "},{". wma "," audio/x-ms-wma "},{". WMD "," APPLICATION/X-MS-WMD "},{ ". Wmf", "Application/x-msmetafile"},{". WML", "TEXT/VND.WAP.WML"},{". Wmlc", "APPLICATION/VND.WAP.WMLC"},{". wmls", " Text/vnd.wap.wmlscript "},{". WMLSC "," ApplicatioN/VND.WAP.WMLSCRIPTC "},{". WMLScript "," Text/vnd.wap.wmlscript "},{". wmv "," audio/x-ms-wmv "},{". Wmx "," video/ X-ms-wmx "},{". wmz "," Application/x-ms-wmz "},{". Wpng "," Image/x-up-wpng "},{". WPs "," Application/vnd.ms-works "},{". WPT "," X-lml/x-gps "},{". Wri "," Application/x-mswrite "},{". Wrl "," X-world/x-vrml "},{". Wrz "," X-world/x-vrml "},{". ws "," Text/vnd.wap.wmlscript "},{". WSC "," APPLICATION/VND.WAP.WMLSCRIPTC "},{". WV "," Video/wavelet "},{". wvx "," video/ X-ms-wvx "},{". Wxl "," APPLICATION/X-WXL "},{". X-gzip "," Application/x-gzip "},{". Xaf "," X-world/x-vrml "},{". Xar "," AP Plication/vnd.xara "},{". XBM "," Image/x-xbitmap "},{". XDm "," APPLICATION/X-XDMA "},{". Xdma "," APPLICATION/X-XDMA "},{ ". Xdw", "Application/vnd.fujixerox.docuworks"},{". Xht", "Application/xhtml+xml"},{". Xhtm", "Application/xhtml+xml "},{". xhtml "," Application/xhtml+xml "},{". Xla "," application/vnd.ms-excel "},{". xlc "," application/vnd.ms-excel "}, {". Xll", "Application/x-excel"},{". xlm", "Application/vnd.ms-excel "},{". xls "," application/vnd.ms-excel "},{". xlsx "," application/ Vnd.openxmlformats-officedocument.spreadsheetml.sheet "},{". xlt "," application/vnd.ms-excel "},{". xlw "," Application/vnd.ms-excel "},{". XM "," Audio/x-mod "},{". xml "," Text/plain "},{". xml "," Application/xml "},[1] {". Xmz "," Audio/x-mod "},{". Xof "," X-world/x-vrml "},{". Xpi "," Application/x-xpinstall "},{". xpm "," Image/x-xpixmap "},{" . Xsit "," Text/xml "},{". Xsl "," Text/xml "},{". Xul "," Text/xul "},{". Xwd "," Image/x-xwindowdump "},{". xyz "," chemical/x -pdb "},{". Yz1 "," Application/x-yz1 "},{". Z "," application/x-compress "},[1] {". Zac "," Application/x-zaurus-zac "},{". zip "," Application/zip "},{". Json "," Application/json "}, 

iOS UIWebView loading files in development