根据图片获取拍照时间和拍照地点
参考 iOS 获得图片的时间（通过拍照和取出） 如何获取iPhone拍摄的png照片的拍摄时间,位置信息等图片属性?
###简单理念
- 拍照获取 拍照即可通过CoreLocation获取当前位置和当前时间。
- 相册获取 相册即可通过ALAssetsLibrary来获取拍摄时间和拍摄地点。
本软件是通过imagePicker的代理回调中获取info，并从info中获取大量有关的信息，部分图片没有是因为拍照时没有录入信息，存在无网络和关闭权限功能。
###引入头文件
#import <MobileCoreServices/MobileCoreServices.h>
#import <ImageIO/CGImageProperties.h>
#import <AssetsLibrary/AssetsLibrary.h>
#import <CoreLocation/CoreLocation.h>
#import "NSDictionary+CLLocation.h"
###定义属性
@property (nonatomic, strong) UIImagePickerController *imagePickerVC;
@property (nonatomic, strong) CLLocationManager *locationmanager;//拍照定位
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@property (weak, nonatomic) IBOutlet UILabel *time;
@property (weak, nonatomic) IBOutlet UILabel *jingdu;
@property (weak, nonatomic) IBOutlet UILabel *weidu;
@property (weak, nonatomic) IBOutlet UILabel *location;
@property (nonatomic, copy) NSString *locationFormat;
###懒加载
#pragma mark 懒加载
- (UIImagePickerController *)imagePickerVC {
if (!_imagePickerVC) {
_imagePickerVC = [[UIImagePickerController alloc] init];
// 设置资源来源（相册、相机、图库之一）
// imagePickerVC.sourceType = UIImagePickerControllerSourceTypeCamera;
// 设置可用的媒体类型、默认只包含kUTTypeImage，如果想选择视频，请添加kUTTypeMovie
// 如果选择的是视屏，允许的视屏时长为20秒
_imagePickerVC.videoMaximumDuration = 20;
// 允许的视屏质量（如果质量选取的质量过高，会自动降低质量）
_imagePickerVC.videoQuality = UIImagePickerControllerQualityTypeHigh;
_imagePickerVC.mediaTypes = @[(NSString *)kUTTypeMovie, (NSString *)kUTTypeImage];
// 设置代理，遵守UINavigationControllerDelegate, UIImagePickerControllerDelegate 协议
_imagePickerVC.delegate = self;
// 是否允许编辑（YES：图片选择完成进入编辑模式）
// _imagePickerVC.allowsEditing = YES;
}
return _imagePickerVC;
}
-(CLLocationManager *)locationManager {
if (!_locationManager) {
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
_locationManager.distanceFilter = 1000.0f;
}
return _locationManager;
}
###拍照相关代码
-(void)getLocation
{
//判断定位功能是否打开
if ([CLLocationManager locationServicesEnabled]) {
self.locationManager = [[CLLocationManager alloc]init];
self.locationManager.delegate = self;
[self.locationManager requestAlwaysAuthorization];
[self.locationManager requestWhenInUseAuthorization];
//设置寻址精度
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.distanceFilter = 5.0;
[self.locationManager startUpdatingLocation];
}
}
//定位失败后调用此代理方法
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{}
//获取一次定位，然后关掉manager
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
//防止多次调用
CLLocation *currentLocation = [locations lastObject];
NSTimeInterval locationAge = -[currentLocation.timestamp timeIntervalSinceNow];
if (locationAge > 5.0) return;
if (currentLocation.horizontalAccuracy < 0) return;
//当前经纬度
self.jingdu.text = [NSString stringWithFormat:@"%f", currentLocation.coordinate.longitude];
self.weidu.text = [NSString stringWithFormat:@"%f", currentLocation.coordinate.latitude];
CLGeocoder *clGeoCoder = [[CLGeocoder alloc] init];
CLLocation *newLocation = [[CLLocation alloc] initWithLatitude:currentLocation.coordinate.latitude longitude:currentLocation.coordinate.longitude];
__weak typeof(self)weakSelf = self;
//反向地理编码的请求 -> 根据经纬度 获取 位置
[clGeoCoder reverseGeocodeLocation:newLocation completionHandler: ^(NSArray *placemarks,NSError *error) {
for (CLPlacemark *placeMark in placemarks)
{
NSDictionary *addressDic=placeMark.addressDictionary;
NSArray *location_Arr = [addressDic objectForKey:@"FormattedAddressLines"];//系统格式化后的位置
weakSelf.location.text = [location_Arr firstObject];
}
}];
[self.locationManager stopUpdatingLocation];
}
###相册相关代码
{//相册
NSURL *assetURL = [info objectForKey:UIImagePickerControllerReferenceURL];
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
__block NSMutableDictionary *imageMetadata_GPS = nil;
__weak typeof(self)weakSelf = self;
[library assetForURL:assetURL resultBlock:^(ALAsset *asset) {
//获取时间
NSDate* pictureDate = [asset valueForProperty:ALAssetPropertyDate];
NSDateFormatter * formatter = [[NSDateFormatter alloc]init];
formatter.dateFormat = @"yyyy:MM:dd HH:mm:ss";
formatter.timeZone = [NSTimeZone localTimeZone];
NSString * pictureTime = [formatter stringFromDate:pictureDate];
weakSelf.time.text = pictureTime;
//获取GPS
imageMetadata_GPS = [[NSMutableDictionary alloc] initWithDictionary:asset.defaultRepresentation.metadata];
NSDictionary *GPSDict=[imageMetadata_GPS objectForKey:(NSString*)kCGImagePropertyGPSDictionary];
if (GPSDict!=nil) {
CLLocation *loc=[GPSDict locationFromGPSDictionary];
weakSelf.weidu.text = [NSString stringWithFormat:@"%f", loc.coordinate.latitude];
weakSelf.jingdu.text = [NSString stringWithFormat:@"%f", loc.coordinate.longitude];
CLGeocoder *clGeoCoder = [[CLGeocoder alloc] init];
CLLocation *newLocation = [[CLLocation alloc] initWithLatitude:loc.coordinate.latitude longitude:loc.coordinate.longitude];
//反向地理编码的请求 -> 根据经纬度 获取 位置
[clGeoCoder reverseGeocodeLocation:newLocation completionHandler: ^(NSArray *placemarks,NSError *error) {
for (CLPlacemark *placeMark in placemarks)
{
NSDictionary *addressDic=placeMark.addressDictionary;
NSArray *location_Arr = [addressDic objectForKey:@"FormattedAddressLines"];//系统格式化后的位置
weakSelf.location.text = [location_Arr firstObject];
}
}];
}else{
weakSelf.weidu.text = @"此照片没有GPS信息";
weakSelf.jingdu.text = @"此照片没有GPS信息";
weakSelf.location.text = @"此照片没有拍摄位置";
}
}
failureBlock:^(NSError *error) {
}];
}
###demo地址 https://github.com/pengshengsongcode/ThroughPicGetShootPlaceWithTime