39 lines
759 B
Objective-C
39 lines
759 B
Objective-C
//
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// UIImage+contentTypes.m
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// Signal
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//
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// Created by Frederic Jacobs on 21/12/14.
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// Copyright (c) 2014 Open Whisper Systems. All rights reserved.
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//
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#import "UIImage+contentTypes.h"
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@implementation UIImage (contentTypes)
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- (NSString*)contentType {
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uint8_t c;
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[UIImagePNGRepresentation(self) getBytes:&c length:1];
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switch (c) {
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case 0xFF:
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return @"image/jpeg";
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case 0x89:
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return @"image/png";
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case 0x47:
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return @"image/gif";
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case 0x49:
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break;
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case 0x42:
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return @"image/bmp";
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case 0x4D:
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return @"image/tiff";
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}
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return nil;
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}
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- (BOOL)isSupportedImageType {
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return ([self contentType]?YES:NO);
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}
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@end
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