kCGImagePropertyExifAuxDictionary對應的字典中可能包含的鍵定義如下：
//鏡頭資訊
const CFStringRef kCGImagePropertyExifAuxLensInfo;
//鏡頭模式
const CFStringRef kCGImagePropertyExifAuxLensModel;
//序列号
const CFStringRef kCGImagePropertyExifAuxSerialNumber;
//鏡頭ID
const CFStringRef kCGImagePropertyExifAuxLensID;
//鏡頭序列号
const CFStringRef kCGImagePropertyExifAuxLensSerialNumber;
//圖檔編号
const CFStringRef kCGImagePropertyExifAuxImageNumber;
//閃光補償
const CFStringRef kCGImagePropertyExifAuxFlashCompensation;
//所有者名稱
const CFStringRef kCGImagePropertyExifAuxOwnerName;
//固件資訊
const CFStringRef kCGImagePropertyExifAuxFirmware;
kCGImagePropertyGIFDictionary對應的字典中可能包含的鍵定義如下：
//動畫循環次數
const CFStringRef kCGImagePropertyGIFLoopCount;
//兩幀之間的延時
const CFStringRef kCGImagePropertyGIFDelayTime;
//顔色Map
const CFStringRef kCGImagePropertyGIFImageColorMap;
const CFStringRef kCGImagePropertyGIFHasGlobalColorMap;
const CFStringRef kCGImagePropertyGIFUnclampedDelayTime;
kCGImagePropertyPNGDictionary對應的字典中可能包含的鍵定義如下：
//PNG伽馬值
const CFStringRef kCGImagePropertyPNGGamma;
//混合類型
const CFStringRef kCGImagePropertyPNGInterlaceType;
//X方向像素數
const CFStringRef kCGImagePropertyPNGXPixelsPerMeter;
//Y方向像素數
const CFStringRef kCGImagePropertyPNGYPixelsPerMeter;
//RGB意圖
const CFStringRef kCGImagePropertyPNGsRGBIntent;
//色度
const CFStringRef kCGImagePropertyPNGChromaticities;
//作者
const CFStringRef kCGImagePropertyPNGAuthor;
//公司
const CFStringRef kCGImagePropertyPNGCopyright;
//建立時間
const CFStringRef kCGImagePropertyPNGCreationTime;
//描述
const CFStringRef kCGImagePropertyPNGDescription;
//最後修改日期時間
const CFStringRef kCGImagePropertyPNGModificationTime;
//軟體
const CFStringRef kCGImagePropertyPNGSoftware;
//标題
const CFStringRef kCGImagePropertyPNGTitle;
const CFStringRef kCGImagePropertyAPNGLoopCount;
const CFStringRef kCGImagePropertyAPNGDelayTime;
const CFStringRef kCGImagePropertyAPNGUnclampedDelayTime;
kCGImagePropertyGPSDictionary對應的字典中可能包含的鍵定義如下：
//GPS版本
const CFStringRef kCGImagePropertyGPSVersion;
//緯度是南緯或北緯
const CFStringRef kCGImagePropertyGPSLatitudeRef;
//緯度
const CFStringRef kCGImagePropertyGPSLatitude;
//經度是東經或西經
const CFStringRef kCGImagePropertyGPSLongitudeRef;
//經度
const CFStringRef kCGImagePropertyGPSLongitude;
//海拔标準
const CFStringRef kCGImagePropertyGPSAltitudeRef;
//海拔高度
const CFStringRef kCGImagePropertyGPSAltitude;
//時間戳
const CFStringRef kCGImagePropertyGPSTimeStamp;
//測量GPS的衛星
const CFStringRef kCGImagePropertyGPSSatellites;
//GPS狀态
const CFStringRef kCGImagePropertyGPSStatus;
//測量模式
const CFStringRef kCGImagePropertyGPSMeasureMode;
//精度資料
const CFStringRef kCGImagePropertyGPSDOP;
//速度标準
const CFStringRef kCGImagePropertyGPSSpeedRef;
//速度
const CFStringRef kCGImagePropertyGPSSpeed;
//運動方向參考
const CFStringRef kCGImagePropertyGPSTrackRef;
//運動方向
const CFStringRef kCGImagePropertyGPSTrack;
//位置方向參考
const CFStringRef kCGImagePropertyGPSImgDirectionRef;
//位置方向
const CFStringRef kCGImagePropertyGPSImgDirection;
//地圖測量資料
const CFStringRef kCGImagePropertyGPSMapDatum;
//地理緯度南緯或北緯
const CFStringRef kCGImagePropertyGPSDestLatitudeRef;
//地理緯度
const CFStringRef kCGImagePropertyGPSDestLatitude;
//地理經度 東經或西經
const CFStringRef kCGImagePropertyGPSDestLongitudeRef;
//地理經度
const CFStringRef kCGImagePropertyGPSDestLongitude;
//方位參照
const CFStringRef kCGImagePropertyGPSDestBearingRef;
//地理方位
const CFStringRef kCGImagePropertyGPSDestBearing;
//距離參照
const CFStringRef kCGImagePropertyGPSDestDistanceRef;
//距離
const CFStringRef kCGImagePropertyGPSDestDistance;
//查找地理位置的方法
const CFStringRef kCGImagePropertyGPSProcessingMethod;
//GPS地區名
const CFStringRef kCGImagePropertyGPSAreaInformation;
//日期時間
const CFStringRef kCGImagePropertyGPSDateStamp;
//校正資訊
const CFStringRef kCGImagePropertyGPSDifferental;
//錯誤資訊
const CFStringRef kCGImagePropertyGPSHPositioningError;
kCGImagePropertyIPTCDictionary對應的字典中可能包含的鍵定義如下：
//對象類型
const CFStringRef kCGImagePropertyIPTCObjectTypeReference;
//對象屬性
const CFStringRef kCGImagePropertyIPTCObjectAttributeReference;
//對象名稱
const CFStringRef kCGImagePropertyIPTCObjectName;
//編輯狀态
const CFStringRef kCGImagePropertyIPTCEditStatus;
//更新狀态
const CFStringRef kCGImagePropertyIPTCEditorialUpdate;
//緊急等級
const CFStringRef kCGImagePropertyIPTCUrgency;
//主體
const CFStringRef kCGImagePropertyIPTCSubjectReference;
//類别
const CFStringRef kCGImagePropertyIPTCCategory;
//補充類别
const CFStringRef kCGImagePropertyIPTCSupplementalCategory;
//Fixture辨別
const CFStringRef kCGImagePropertyIPTCFixtureIdentifier;
//關鍵字
const CFStringRef kCGImagePropertyIPTCKeywords;
//内容定位碼
const CFStringRef kCGImagePropertyIPTCContentLocationCode;
//内容位置名稱
const CFStringRef kCGImagePropertyIPTCContentLocationName;
//圖像使用的最早日期
const CFStringRef kCGImagePropertyIPTCReleaseDate;
//圖像使用的最早時間
const CFStringRef kCGImagePropertyIPTCReleaseTime;
//最後一次使用日期
const CFStringRef kCGImagePropertyIPTCExpirationDate;
//最後一次使用時間
const CFStringRef kCGImagePropertyIPTCExpirationTime;
//圖像使用的特别說明
const CFStringRef kCGImagePropertyIPTCSpecialInstructions;
//建議行為
const CFStringRef kCGImagePropertyIPTCActionAdvised;
//服務參考
const CFStringRef kCGImagePropertyIPTCReferenceService;
//日期參考
const CFStringRef kCGImagePropertyIPTCReferenceDate;
//參考碼
const CFStringRef kCGImagePropertyIPTCReferenceNumber;
//建立日期
const CFStringRef kCGImagePropertyIPTCDateCreated;
const CFStringRef kCGImagePropertyIPTCTimeCreated;
//數字建立日期
const CFStringRef kCGImagePropertyIPTCDigitalCreationDate;
//數字建立時間
const CFStringRef kCGImagePropertyIPTCDigitalCreationTime;
//原始程式
const CFStringRef kCGImagePropertyIPTCOriginatingProgram;
//程式版本
const CFStringRef kCGImagePropertyIPTCProgramVersion;
圖像的編輯周期（早晨，晚上或兩者）。
const CFStringRef kCGImagePropertyIPTCObjectCycle;
//不想建立者名稱
const CFStringRef kCGImagePropertyIPTCByline;
//圖像建立标題
const CFStringRef kCGImagePropertyIPTCBylineTitle;
//城市資訊
const CFStringRef kCGImagePropertyIPTCCity;
//城市内位置
const CFStringRef kCGImagePropertyIPTCSubLocation;
//省份
const CFStringRef kCGImagePropertyIPTCProvinceState;
//國家編碼
const CFStringRef kCGImagePropertyIPTCCountryPrimaryLocationCode;
//國家名稱
const CFStringRef kCGImagePropertyIPTCCountryPrimaryLocationName;
//OriginalTransmission參考
const CFStringRef kCGImagePropertyIPTCOriginalTransmissionReference;
//圖像内容摘要
const CFStringRef kCGImagePropertyIPTCHeadline;
//提供圖像服務的名稱
const CFStringRef kCGImagePropertyIPTCCredit;
//圖像源
const CFStringRef kCGImagePropertyIPTCSource;
//公司提示
const CFStringRef kCGImagePropertyIPTCCopyrightNotice;
//聯系人
const CFStringRef kCGImagePropertyIPTCContact;
const CFStringRef kCGImagePropertyIPTCCaptionAbstract;
//圖像編輯者
const CFStringRef kCGImagePropertyIPTCWriterEditor;
//圖像類型
const CFStringRef kCGImagePropertyIPTCImageType;
//方向資訊
const CFStringRef kCGImagePropertyIPTCImageOrientation;
//語言資訊
const CFStringRef kCGImagePropertyIPTCLanguageIdentifier;
//星級
const CFStringRef kCGImagePropertyIPTCStarRating;
//聯系人詳細資訊
const CFStringRef kCGImagePropertyIPTCCreatorContactInfo;
//圖像使用權限
const CFStringRef kCGImagePropertyIPTCRightsUsageTerms;
//場景代碼
const CFStringRef kCGImagePropertyIPTCScene;
上面的kCGImagePropertyIPTCCreatorContactInfo對應的字典中鍵的定義如下：
//聯系人城市
const CFStringRef kCGImagePropertyIPTCContactInfoCity;
//聯系人國家
const CFStringRef kCGImagePropertyIPTCContactInfoCountry;
//聯系人位址
const CFStringRef kCGImagePropertyIPTCContactInfoAddress;
//郵編
const CFStringRef kCGImagePropertyIPTCContactInfoPostalCode;
const CFStringRef kCGImagePropertyIPTCContactInfoStateProvince;
//電子郵件
const CFStringRef kCGImagePropertyIPTCContactInfoEmails;
//電話
const CFStringRef kCGImagePropertyIPTCContactInfoPhones;
//網址
const CFStringRef kCGImagePropertyIPTCContactInfoWebURLs;
kCGImageProperty8BIMDictionary對應的字典中可能包含的鍵定義如下：
//Photoshop檔案的圖層名
const CFStringRef kCGImageProperty8BIMLayerNames;
//版本
const CFStringRef kCGImageProperty8BIMVersion;
kCGImagePropertyDNGDictionary對應的字典中可能包含的鍵定義如下：
//DNG版本
const CFStringRef kCGImagePropertyDNGVersion;
//相容的最老版本
const CFStringRef kCGImagePropertyDNGBackwardVersion;
//錄影機模型
const CFStringRef kCGImagePropertyDNGUniqueCameraModel;
const CFStringRef kCGImagePropertyDNGLocalizedCameraModel;
//相機序列碼
const CFStringRef kCGImagePropertyDNGCameraSerialNumber;
const CFStringRef kCGImagePropertyDNGLensInfo;
//黑度等級
const CFStringRef kCGImagePropertyDNGBlackLevel;
//白度等級
const CFStringRef kCGImagePropertyDNGWhiteLevel;
const CFStringRef kCGImagePropertyDNGCalibrationIlluminant1;
const CFStringRef kCGImagePropertyDNGCalibrationIlluminant2;
const CFStringRef kCGImagePropertyDNGColorMatrix1;
const CFStringRef kCGImagePropertyDNGColorMatrix2;
const CFStringRef kCGImagePropertyDNGCameraCalibration1;
const CFStringRef kCGImagePropertyDNGCameraCalibration2;
const CFStringRef kCGImagePropertyDNGAsShotNeutral;
const CFStringRef kCGImagePropertyDNGAsShotWhiteXY;
const CFStringRef kCGImagePropertyDNGBaselineExposure;
const CFStringRef kCGImagePropertyDNGBaselineNoise;
const CFStringRef kCGImagePropertyDNGBaselineSharpness;
const CFStringRef kCGImagePropertyDNGPrivateData;
const CFStringRef kCGImagePropertyDNGCameraCalibrationSignature;
const CFStringRef kCGImagePropertyDNGProfileCalibrationSignature;
const CFStringRef kCGImagePropertyDNGNoiseProfile;
const CFStringRef kCGImagePropertyDNGWarpRectilinear;
const CFStringRef kCGImagePropertyDNGWarpFisheye;
const CFStringRef kCGImagePropertyDNGFixVignetteRadial;
kCGImagePropertyCIFFDictionary對應的字典中可能包含的鍵定義如下：
//相機資訊
const CFStringRef kCGImagePropertyCIFFDescription;
//固件版本
const CFStringRef kCGImagePropertyCIFFFirmware;
const CFStringRef kCGImagePropertyCIFFOwnerName;
//圖檔名
const CFStringRef kCGImagePropertyCIFFImageName;
//圖檔檔案名
const CFStringRef kCGImagePropertyCIFFImageFileName;
//曝光方式
const CFStringRef kCGImagePropertyCIFFReleaseMethod;
//曝光時間
const CFStringRef kCGImagePropertyCIFFReleaseTiming;
//RecordID
const CFStringRef kCGImagePropertyCIFFRecordID;
const CFStringRef kCGImagePropertyCIFFSelfTimingTime;
//相機序列号
const CFStringRef kCGImagePropertyCIFFCameraSerialNumber;
//圖檔編碼
const CFStringRef kCGImagePropertyCIFFImageSerialNumber;
//驅動模式
const CFStringRef kCGImagePropertyCIFFContinuousDrive);
//焦點模式
const CFStringRef kCGImagePropertyCIFFFocusMode;
const CFStringRef kCGImagePropertyCIFFMeteringMode;
//曝光模式
const CFStringRef kCGImagePropertyCIFFShootingMode;
//透鏡模式
const CFStringRef kCGImagePropertyCIFFLensModel;
//最長鏡頭長度
const CFStringRef kCGImagePropertyCIFFLensMaxMM;
//最短鏡頭長度
const CFStringRef kCGImagePropertyCIFFLensMinMM;
//白平衡等級
const CFStringRef kCGImagePropertyCIFFWhiteBalanceIndex;
//曝光補償
const CFStringRef kCGImagePropertyCIFFFlashExposureComp;
//實測曝光值
const CFStringRef kCGImagePropertyCIFFMeasuredEV);
六、ImageIO架構在實際開發中的幾個應用
1.顯示特殊格式的圖檔
在平時開發中，我們通常使用UIImage來讀取圖檔，UIImage支援的圖檔包括png與jpg等，但是類似windows系統的ico圖示，UIImage預設是無法顯示的，可以通過ImageIO架構來在iOS系統中使用ico圖示，示例如下：
NSString * path = [[NSBundle mainBundle]pathForResource:@"image" ofType:@"ico"];
NSURL * url = [NSURL fileURLWithPath:path];
CGImageRef myImage = NULL;
CGImageSourceRef myImageSource;
CFDictionaryRef myOptions = NULL;
myImageSource = CGImageSourceCreateWithURL((CFURLRef)url, NULL);
myImage = CGImageSourceCreateImageAtIndex(myImageSource,
0,
NULL);
CFRelease(myImageSource);
UIImageView * image = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 200, 200)];
image.image = [UIImage imageWithCGImage:myImage];
2.讀取數位相機拍攝圖檔的地理位置、時間等資訊
3.對相冊中圖檔的地理位置，時間等資訊進行自定義修改。
4.将自定義格式的圖檔資料寫入本地檔案。
5.展示GIF動圖
詳情見部落格：
https://my.oschina.net/u/2340880/blog/608560。
6.漸進渲染大圖
漸進渲染技術在對加載大圖檔時特别重要，你應該使用過地圖軟體，地圖視圖在加載時是局部進行加載，當移動或者放大時，地圖會一部分一部分的漸進進行加載，使用ImageIO架構可以實作大圖漸進渲染的效果，一般在對大圖檔進行網絡請求時，可以擷取一部分資料就加載一部分資料，為了便于示範，部落格中使用定時器來預設網絡傳回資料，代碼示例如下：
@interface ViewController ()
{
NSMutableData * _data;
NSData * _allData;
NSUInteger length;
UIImageView * _imageView;
NSTimer * timer;
NSInteger le;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_data = [[NSMutableData alloc]init];
NSString * path = [[NSBundle mainBundle]pathForResource:@"Default-Portrait-ns@2x" ofType:@"png"];
_allData = [NSData dataWithContentsOfFile:path];
length = _allData.length;
le = length/10;
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateImage) userInfo:nil repeats:YES];
_imageView = [[UIImageView alloc]initWithFrame:self.view.frame];
[self.view addSubview:_imageView];
-(void)updateImage{
static int index = 0;
if (index==10) {
return;
}
NSUInteger l;
if (index==9) {
l=length-le*9;
}else{
l= le;
Byte by[l];
[_allData getBytes:by range:NSMakeRange(index*le, l)];
[_data appendBytes:by length:l];
CGImageSourceRef myImageSource = CGImageSourceCreateWithData((CFDataRef)_data, NULL);
CGImageRef myImage = CGImageSourceCreateImageAtIndex(myImageSource,
_imageView.image = [UIImage imageWithCGImage:myImage];
// image.image = [UIImage imageNamed:@"image.ico"];
index++;
效果如下：
![（1）如何快速的在指定檔案夾打開指令行？（1）如何快速的在指定檔案夾打開指令行？[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)