Created
November 14, 2018 23:38
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An extension for Data to get the file extension
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| extension Data { | |
| private static let mimeTypeSignatures: [UInt8 : String] = [ | |
| 0xFF : "image/jpeg", | |
| 0x89 : "image/png", | |
| 0x47 : "image/gif", | |
| 0x49 : "image/tiff", | |
| 0x4D : "image/tiff", | |
| 0x25 : "application/pdf", | |
| 0xD0 : "application/vnd", | |
| 0x46 : "text/plain", | |
| ] | |
| var mimeType: String { | |
| var c: UInt8 = 0 | |
| copyBytes(to: &c, count: 1) | |
| return Data.mimeTypeSignatures[c] ?? "application/octet-stream" | |
| } | |
| var fileExtension: String { | |
| switch mimeType { | |
| case "image/jpeg": | |
| return "jpeg" | |
| case "image/png": | |
| return "png" | |
| case "image/gif": | |
| return "gif" | |
| case "image/tiff": | |
| return "tiff" | |
| case "application/pdf": | |
| return "pdf" | |
| case "application/vnd": | |
| return "vnd" | |
| case "text/plain": | |
| return "txt" | |
| default: | |
| return "uknown" | |
| } | |
| } | |
| } |
Have you ever encountered an error like this? I have the same code as above.
Crashed: com.apple.main-thread
0 libswiftFoundation.dylib 0x118b10 Data.copyBytes(to:count:) + 340
1 My Apps 0x42432c Data.mimeType.getter + 13 (Data.swift:13)
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👍 what is the mimeTypeSignatures for video, audio, svg other can you please update?