首先介绍下iOS平台下，根据iOS不同版本执行不同方法，有很多种，这里用一种即可：
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| NSString *version = [UIDevice currentDevice].systemVersion;
if (version.doubleValue >= 8.0) {
// 针对 8.0 以上的iOS系统进行处理
} else {
// 针对 8.0 以下的iOS系统进行处理
}
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对相册的操做在不同的iOS系统将会使用不同的框架，iOS8.0以下使用AssetsLibrary framework,对于大于iOS8.0要使用Photos framework。
检查是否有相册权限
返回当前权限状态，动态权限具体查看：
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| + (int)checkPermission{
NSString *version = [UIDevice currentDevice].systemVersion;
if (version.doubleValue >= 8.0) {
// 针对 8.0 以上的iOS系统进行处理
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
return (int)status;
} else {
// 针对 8.0 以下的iOS系统进行处理
ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus];
return (int)status;
}
}
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申请相册权限
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| + (int)requestPermission {
int status = [self checkPermission];
if(status == 0 || status == 2) {
__block BOOL authorized = NO;
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
NSString *version = [UIDevice currentDevice].systemVersion;
if (version.doubleValue >= 8.0) {
// 针对 8.0 以上的iOS系统进行处理
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
authorized = (status == PHAuthorizationStatusAuthorized);
dispatch_semaphore_signal(sema);
}];
} else {
// 针对 8.0 以下的iOS系统进行处理
[lib enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
*stop = YES;
authorized = YES;
dispatch_semaphore_signal(sema);
} failureBlock:^(NSError *error) {
dispatch_semaphore_signal(sema);
}];
}
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
return authorized ? 1 : 0;
}else{
return status;
}
}
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保存图片到相册
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|
+ (void)saveMediaNew:(NSString *)path luaID:(int) luaSaveCallback albumName:(NSString *)album{
void (^saveBlock)(PHAssetCollection *assetCollection) = ^void(PHAssetCollection *assetCollection) {
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetChangeRequest *assetChangeRequest;
assetChangeRequest = [PHAssetChangeRequest creationRequestForAssetFromImageAtFileURL:[NSURL fileURLWithPath:path]];
PHAssetCollectionChangeRequest *assetCollectionChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:assetCollection];
[assetCollectionChangeRequest addAssets:@[[assetChangeRequest placeholderForCreatedAsset]]];
} completionHandler:^(BOOL success, NSError *error) {
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
if(success){
[self execSaveToGalleryLuaFunc: @"success" withLuaFuncID: luaSaveCallback];
}
else {
NSLog(@"Error creating asset: %@", error);
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}
}];
};
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.predicate = [NSPredicate predicateWithFormat:@"localizedTitle = %@", album];
PHFetchResult *fetchResult = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:fetchOptions];
if (fetchResult.count > 0) {
saveBlock(fetchResult.firstObject);
}
else {
__block PHObjectPlaceholder *albumPlaceholder;
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetCollectionChangeRequest *changeRequest = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:album];
albumPlaceholder = changeRequest.placeholderForCreatedAssetCollection;
} completionHandler:^(BOOL success, NSError *error) {
if (success) {
PHFetchResult *fetchResult = [PHAssetCollection fetchAssetCollectionsWithLocalIdentifiers:@[albumPlaceholder.localIdentifier] options:nil];
if (fetchResult.count > 0)
saveBlock(fetchResult.firstObject);
else {
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
[self execSaveToGalleryLuaFunc:@"Album placeholder not found" withLuaFuncID:luaSaveCallback];
}
}
else {
NSLog(@"Error creating album: %@", error);
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}
}];
}
}
+ (void)saveMediaOld:(NSString *)path luaID:(int) luaSaveCallback albumName:(NSString *)album{
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 80000
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
void (^saveBlock)(ALAssetsGroup *assetCollection) = ^void(ALAssetsGroup *assetCollection) {
void (^saveResultBlock)(NSURL *assetURL, NSError *error) = ^void(NSURL *assetURL, NSError *error) {
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
if (error.code == 0) {
[library assetForURL:assetURL resultBlock:^(ALAsset *asset) {
[assetCollection addAsset:asset];
[self execSaveToGalleryLuaFunc: @"success" withLuaFuncID: luaSaveCallback];
} failureBlock:^(NSError* error) {
NSLog(@"Error moving asset to album: %@", error);
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}];
}
else {
NSLog(@"Error creating asset: %@", error);
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}
};
[library writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:path] completionBlock:saveResultBlock];
};
__block BOOL albumFound = NO;
[library enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if ([[group valueForProperty:ALAssetsGroupPropertyName] isEqualToString:album]) {
*stop = YES;
albumFound = YES;
saveBlock(group);
}
else if (group == nil && albumFound==NO) {
[library addAssetsGroupAlbumWithName:album resultBlock:^(ALAssetsGroup *group) {
saveBlock(group);
}
failureBlock:^(NSError *error) {
NSLog(@"Error creating album: %@", error);
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}];
}
} failureBlock:^(NSError* error) {
NSLog(@"Error listing albums: %@", error);
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
[self execSaveToGalleryLuaFunc:[error localizedDescription] withLuaFuncID:luaSaveCallback];
}];
#endif
}
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