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保存图片到指定相册 支持创建新相册
现在工程中遇到一个问题,在选择页面中需要集成一个相机按钮,拍照后相册中要实时更新,下面贴一下保存图片到相册的代码,做了一个相册判断要不然会有可能出现重名的相册,或者同张照片会重复.
.h
#import
#import
@interface CreateAlbumGroup : NSObject
@property(nonatomic)ALAsset *savedImageAlasset;
//当前选中的相册 主要是为了区分是不是系统相册 因为可能会创建出一个与系统相册同名的相册
@property(nonatomic)ALAssetsGroup *selectGroup;
#pragma mark - 在手机相册中创建相册 并保存照片
//groupName 要保存的相册名称 imageData 要保存的图片数据
- (void)createAlbumInPhoneAlbumWithGroupName:(NSString *)groupName andImageData:(NSData *)imageData;
@end
.m
#import "CreateAlbumGroup.h"
#import "AssetHelper.h"
@implementation CreateAlbumGroup
#pragma mark - 在手机相册中创建相册 并保存照片
- (void)createAlbumInPhoneAlbumWithGroupName:(NSString *)groupName andImageData:(NSData *)imageData
{
ALAssetsLibrary *assetsLibrary = [AssetHelper defaultAssetsLibrary];
//如果是系统相册 系统相册type 为16
NSString *groupType = [NSString stringWithFormat:@"%@",[self.selectGroup valueForProperty:ALAssetsGroupPropertyType]];
if([groupType isEqualToString:@"16"])
{
UIImage *returnedImage = [UIImage imageWithData:imageData];
[assetsLibrary writeImageToSavedPhotosAlbum:returnedImage.CGImage orientation:(ALAssetOrientation)(returnedImage.imageOrientation) completionBlock:^(NSURL *assetURL, NSError *error)
{
if(error)
{
NSLog(@"保存失败");
}
else
{
NSLog(@"保存成功 %@",assetURL);
ALAssetsLibrary *assetLibrary = [AssetHelper defaultAssetsLibrary];
[assetLibrary assetForURL:assetURL resultBlock:^(ALAsset *asset) // substitute YOURURL with your url of video
{
//asset即为保存后的照片对象 发通知照片已经保存
[[NSNotificationCenter defaultCenter]postNotificationName:@"saveCameraPhoto" object:nil];
}
failureBlock:^(NSError *err) {
NSLog(@"Error: %@",[err localizedDescription]);
}];
}
}];
return;
}
NSMutableArray *groups=[[NSMutableArray alloc]init];
ALAssetsLibraryGroupsEnumerationResultsBlock listGroupBlock = ^(ALAssetsGroup *group, BOOL *stop)
{
if (group)
{
[groups addObject:group];
}
else
{
BOOL haveHDRGroup = NO;
for (ALAssetsGroup *gp in groups)
{
NSString *name =[gp valueForProperty:ALAssetsGroupPropertyName];
if ([name isEqualToString:groupName])
{
haveHDRGroup = YES;
}
}
if (!haveHDRGroup)
{
//do add a group named "XXXX"
[assetsLibrary addAssetsGroupAlbumWithName:groupName
resultBlock:^(ALAssetsGroup *group)
{
[groups addObject:group];
}
failureBlock:nil];
haveHDRGroup = YES;
}
}
};
//创建相簿
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:listGroupBlock failureBlock:nil];
[self saveToAlbumWithMetadata:nil imageData:imageData customAlbumName:groupName completionBlock:^
{
//这里可以创建添加成功的方法
}
failureBlock:^(NSError *error)
{
//处理添加失败的方法显示alert让它回到主线程执行，不然那个框框死活不肯弹出来
dispatch_async(dispatch_get_main_queue(), ^{
//添加失败一般是由用户不允许应用访问相册造成的，这边可以取出这种情况加以判断一下
if([error.localizedDescription rangeOfString:@"User denied access"].location != NSNotFound ||[error.localizedDescription rangeOfString:@"用户拒绝访问"].location!=NSNotFound){
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:error.localizedDescription message:error.localizedFailureReason delegate:nil cancelButtonTitle:NSLocalizedString(@"ok", nil) otherButtonTitles: nil];
[alert show];
}
});
}];
}
- (void)saveToAlbumWithMetadata:(NSDictionary *)metadata
imageData:(NSData *)imageData
customAlbumName:(NSString *)customAlbumName
completionBlock:(void (^)(void))completionBlock
failureBlock:(void (^)(NSError *error))failureBlock
{
ALAssetsLibrary *assetsLibrary = [AssetHelper defaultAssetsLibrary];
void (^AddAsset)(ALAssetsLibrary *, NSURL *) = ^(ALAssetsLibrary *assetsLibrary, NSURL *assetURL) {
[assetsLibrary assetForURL:assetURL resultBlock:^(ALAsset *asset)
{
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if ( [[group valueForProperty:ALAssetsGroupPropertyPersistentID] isEqualToString:[self.selectGroup valueForProperty:ALAssetsGroupPropertyPersistentID]])
{
[group addAsset:asset];
if (completionBlock)
{
//asset是新建相册后保存的照片对象 发通知照片已经保存
[[NSNotificationCenter defaultCenter]postNotificationName:@"saveCameraPhoto" object:nil];
completionBlock();
}
}
} failureBlock:^(NSError *error) {
if (failureBlock) {
failureBlock(error);
}
}];
} failureBlock:^(NSError *error) {
if (failureBlock) {
failureBlock(error);
}
}];
};
[assetsLibrary writeImageDataToSavedPhotosAlbum:imageData metadata:metadata completionBlock:^(NSURL *assetURL, NSError *error) {
if (customAlbumName) {
[assetsLibrary addAssetsGroupAlbumWithName:customAlbumName resultBlock:^(ALAssetsGroup *group) {
if (group) {
[assetsLibrary assetForURL:assetURL resultBlock:^(ALAsset *asset) {
[group addAsset:asset];
if (completionBlock) {
completionBlock();
}
} failureBlock:^(NSError *error) {
if (failureBlock) {
failureBlock(error);
}
}];
} else {
AddAsset(assetsLibrary, assetURL);
NSLog(@"2");
}
} failureBlock:^(NSError *error) {
AddAsset(assetsLibrary, assetURL);
}];
} else {
if (completionBlock) {
NSLog(@"3");
completionBlock();
}
}
}];
}
@end