swift-基于swift模仿NewsDigest的小项目

基于swift模仿News Digest的小项目

//
// Created by Fabrice Aneche on 06/01/14.
// Copyright （c） 2014 Dailymotion. All rights reserved.
//

#import “NSData+ImageContentType.h“


@implementation NSData （ImageContentType）

+ （NSString *）sd_contentTypeForImageData:（NSData *）data {
    uint8_t c;
    [data getBytes:&c length:1];
    switch （c） {
        case 0xFF:
            return @“image/jpeg“;
        case 0x89:
            return @“image/png“;
        case 0x47:
            return @“image/gif“;
        case 0x49:
        case 0x4D:
            return @“image/tiff“;
        case 0x52:
            // R as RIFF for WEBP
            if （[data length] < 12） {
                return nil;
            }

            NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange（0 12）] encoding:NSASCIIStringEncoding];
            if （[testString hasPrefix:@“RIFF“] && [testString hasSuffix:@“WEBP“]） {
                return @“image/webp“;
            }

            return nil;
    }
    return nil;
}

@end


@implementation NSData （ImageContentTypeDeprecated）

+ （NSString *）contentTypeForImageData:（NSData *）data {
    return [self sd_contentTypeForImageData:data];
}

@end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-05-10 08:01  JNews-master\
     目录           0  2017-05-10 08:01  JNews-master\Gif\
     文件     3526969  2017-05-10 08:01  JNews-master\Gif\1.gif
     文件     1610622  2017-05-10 08:01  JNews-master\Gif\2.gif
     文件     3119366  2017-05-10 08:01  JNews-master\Gif\3.gif
     文件     1585784  2017-05-10 08:01  JNews-master\Gif\4.gif
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\
     文件       51683  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.pbxproj
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.xcworkspace\
     文件         150  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.xcworkspace\contents.xcworkspacedata
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.xcworkspace\xcuserdata\
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\
     文件       53651  2017-05-10 08:01  JNews-master\JNews.xcodeproj\project.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\UserInterfaceState.xcuserstate
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\xcdebugger\
     文件          91  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\xcdebugger\Breakpoints_v2.xcbkptlist
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\xcschemes\
     文件        4131  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\xcschemes\JNews.xcscheme
     文件         657  2017-05-10 08:01  JNews-master\JNews.xcodeproj\xcuserdata\chenkaijie.xcuserdatad\xcschemes\xcschememanagement.plist
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcworkspace\
     文件         223  2017-05-10 08:01  JNews-master\JNews.xcworkspace\contents.xcworkspacedata
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcworkspace\xcuserdata\
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\
     文件      144628  2017-05-10 08:01  JNews-master\JNews.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\UserInterfaceState.xcuserstate
     目录           0  2017-05-10 08:01  JNews-master\JNews.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\xcdebugger\
     文件          91  2017-05-10 08:01  JNews-master\JNews.xcworkspace\xcuserdata\chenkaijie.xcuserdatad\xcdebugger\Breakpoints_v2.xcbkptlist
     目录           0  2017-05-10 08:01  JNews-master\JNews\
     文件        2448  2017-05-10 08:01  JNews-master\JNews\AppDelegate.swift
     目录           0  2017-05-10 08:01  JNews-master\JNews\Assets.xcassets\
     目录           0  2017-05-10 08:01  JNews-master\JNews\Assets.xcassets\AppIcon.appiconset\
............此处省略261个文件信息