这里用到的不是很复杂的东西都是网上现成的东西，我只是做了一次搬运工。
一，拍照后储存照片到相册中
拍完照后将图片储存到相册中这是一个比较简单代码块，这里不说了下面就是代码。
#pragma mark 将照片插入到相册中
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
if ([self isCanUsePhotos] == NO){
UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"无法使用照片" message:@"请在iPhone的""设置-隐私-照片""中允许访问照片" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"设置", nil];
[alert show];
}else{
[picker dismissViewControllerAnimated:YES completion:^{}];
UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
if (image == nil)
image = [info objectForKey:UIImagePickerControllerOriginalImage];
[_selectedPhotos addObject:image];
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]){
//如果是图片
UIImage *images = [info objectForKey:UIImagePickerControllerEditedImage];
UIImageWriteToSavedPhotosAlbum(images, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
[_collectionView reloadData];
[self imageArray];
}
}
//是否有授权
- (BOOL)isCanUsePhotos
{
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.0) {
ALAuthorizationStatus author =[ALAssetsLibrary authorizationStatus];
if (author == ALAuthorizationStatusRestricted || author ==ALAuthorizationStatusDenied) {
//无权限
return NO;
}
}
else {
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
if (status == PHAuthorizationStatusRestricted ||
status == PHAuthorizationStatusDenied) {
//无权限
return NO;
}
}
return YES;
}
二，告述浏览图片器拍到的照片
这是因为浏览相册模块用的是PHAsset格式，所以我们这里也要使用PHAsset格式放入浏览模块中。
我们要获取相册的代码只能获取所有图片，在这里我就要适当的做一下处理。
图片储存也如同我的数据一样它是有一定的规律的，这里我用到了时间作为排序，时间越晚的越在最后。按照这个规律我们只要取到最后一个照片，那就是我刚才拍到的那张照片。下面就是具体的代码
-(NSMutableArray*)GetALLphotosUsingPohotKit
{
NSMutableArray *arr = [NSMutableArray array];
// 所有智能相册
PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
for (NSInteger i = 0; i < smartAlbums.count; i++) {
// 是否按创建时间排序
PHFetchOptions *option = [[PHFetchOptions alloc] init];
option.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];
option.predicate = [NSPredicate predicateWithFormat:@"mediaType == %ld", PHAssetMediaTypeImage];
PHCollection *collection = smartAlbums[i];
// PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;
// NSLog(@"name:%@",cameraRoll.localizedTitle);
// NSLog(@"这里有没有不是collection:%@",collection);
//遍历获取相册
if ([collection isKindOfClass:[PHAssetCollection class]]) {
// NSLog(@"相机胶卷:%@",collection.localizedTitle);
if ([collection.localizedTitle isEqualToString:@"All Photos"] || [collection.localizedTitle isEqualToString:@"Camera Roll"] || [collection.localizedTitle isEqualToString:@"相机胶卷"] || [collection.localizedTitle isEqualToString:@"所有照片"]) {
PHAssetCollection *assetCollection = (PHAssetCollection *)collection;
PHFetchResult *fetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:nil];
// NSLog(@"这里有没有不是:%@",fetchResult);
NSArray *assets;
if (fetchResult.count > 0) {
// 某个相册里面的所有PHAsset对象
assets = [self getAllPhotosAssetInAblumCollection:assetCollection ascending:YES ];
// NSLog(@"这里有没有:%@",assets);
[arr addObjectsFromArray:assets];
}
}
}
}
//返回相机胶卷内的所有照片数组
return arr;
}
- (NSArray *)getAllPhotosAssetInAblumCollection:(PHAssetCollection *)assetCollection ascending:(BOOL)ascending
{
// 存放所有图片对象
NSMutableArray *assets = [NSMutableArray array];
// 是否按创建时间排序
PHFetchOptions *option = [[PHFetchOptions alloc] init];
option.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:ascending]];
option.predicate = [NSPredicate predicateWithFormat:@"mediaType == %ld", PHAssetMediaTypeImage];
// 获取所有图片对象
PHFetchResult *result = [PHAsset fetchAssetsInAssetCollection:assetCollection options:option];
// 遍历
[result enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL * _Nonnull stop) {
[assets addObject:asset];
}];
return assets;
}
//图片储存成功后代码，以及告述浏览相册我刚才拍的是那张相片
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
NSMutableArray *assets = [self GetALLphotosUsingPohotKit];
//获取最后一张图片
PHAsset *asse = assets[assets.count - 1];
NSArray *arrayImage = [NSArray arrayWithObjects:asse, nil];
[_selectedAssets addObjectsFromArray:arrayImage];
// [self getOriginalImages];
// NSLog(@"image = %@, error = %@, contextInfo = %@", image, error, contextInfo);
// NSLog(@"这里有什么数据:%lu",(unsigned long)assets.count);
// NSLog(@"有无权限:%d",[self isCanUsePhotos]);
}
实例：
实例.gif
