1.图片或者视频在icloud上，选择后返回phasset对象存在不为空，但是获取本地路径为nil。
在选择资源时，可以判断本地资源是否可用，不可用代表在icloud的，需要下载，而在ZLPhotoBrowser中，是写死了返回YES，逻辑被注释掉了，我们将这个方法换成以下方法，这样在选择资源时，就会判断本地资源是否可用，并有相应的提示或者下载
+ (BOOL)judgeAssetisInLocalAblum:(PHAsset *)asset
{
// return YES;
__block BOOL isInLocal = YES;
if (@available(iOS 10.0, *)) {
// https://stackoverflow.com/questions/31966571/check-given-phasset-is-icloud-asset
// 这个api虽然是9.0出的，但是9.0会全部返回NO，未知原因，暂时先改为10.0
NSArray *resourceArray = [PHAssetResource assetResourcesForAsset:asset];
for (id obj in resourceArray) {
BOOL result = [[obj valueForKey:@"locallyAvailable"] boolValue];
if (!result){
isInLocal = NO;
}
}
} else {
PHImageRequestOptions *option = [[PHImageRequestOptions alloc] init];
option.resizeMode = PHImageRequestOptionsResizeModeFast;
option.networkAccessAllowed = NO;
option.synchronous = YES;
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:CGSizeMake(100, 100) contentMode:PHImageContentModeAspectFit options:option resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
if ([[info objectForKey:PHImageResultIsInCloudKey] boolValue]) {
isInLocal = NO;
}
}];
}
return isInLocal;
}
2.该框架并没有提供非混合选择模式下(选的第一个资源是图片，那视频资源就不可选；选了视频，图片资源就不可选)对应的图片选择上限和视频选择上限，比如选图片能选9张，视频只能选1个。
找到以下三个类,带有以下注释的if语句就是我修改或者添加的方法，注意添加的位置要和我保持一致，其他的不需要变化
ZLShowBigImgViewController.m
ZLThumbnailViewController.m
ZLPhotoActionSheet.m
// 最多选择图片数...
if...
// 最多选择视频数...
if...
这个是我为configuration添加的一个属性，用来设置视频选择的最大上限
configuration.maxVideoSelectCount
ZLShowBigImgViewController覆盖以下方法
- (void)navRightBtn_Click:(UIButton *)btn
{
ZLImageNavigationController *nav = (ZLImageNavigationController *)self.navigationController;
ZLPhotoConfiguration *configuration = nav.configuration;
ZLPhotoModel *model = self.models[_currentPage-1];
if (!btn.selected) {
//选中
[btn.layer addAnimation:GetBtnStatusChangedAnimation() forKey:nil];
// 最多选择图片数
if (configuration.allowMixSelect==NO && (model.type==ZLAssetMediaTypeGif||model.type==ZLAssetMediaTypeImage)) {
if (nav.arrSelectedModels.count >= configuration.maxSelectCount) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxSelectCountText), configuration.maxSelectCount);
return;
}
}
if (model.asset && ![ZLPhotoManager judgeAssetisInLocalAblum:model.asset]) {
ShowToastLong(@"%@", GetLocalLanguageTextValue(ZLPhotoBrowserLoadingText));
return;
}
if (model.type == ZLAssetMediaTypeVideo && GetDuration(model.duration) > configuration.maxVideoDuration) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxVideoDurationText), configuration.maxVideoDuration);
return;
}
// 最多选择视频数
if (configuration.allowMixSelect==NO && model.type==ZLAssetMediaTypeVideo) {
if (nav.arrSelectedModels.count >= configuration.maxVideoSelectCount) {
[MBProgressHUD showError:[NSString stringWithFormat:@"最多只能选择%ld个视频", configuration.maxVideoSelectCount]];
return;
}
}
model.selected = YES;
[nav.arrSelectedModels addObject:model];
if (self.arrSelPhotos) {
[self.arrSelPhotos addObject:_arrSelPhotosBackup[_currentPage-1]];
[_arrSelAssets addObject:_arrSelAssetsBackup[_currentPage-1]];
}
} else {
//移除
model.selected = NO;
for (ZLPhotoModel *m in nav.arrSelectedModels) {
if ([m.asset.localIdentifier isEqualToString:model.asset.localIdentifier] ||
[m.image isEqual:model.image] ||
[m.url.absoluteString isEqualToString:model.url.absoluteString]) {
[nav.arrSelectedModels removeObject:m];
break;
}
}
if (self.arrSelPhotos) {
for (PHAsset *asset in _arrSelAssets) {
if ([asset isEqual:_arrSelAssetsBackup[_currentPage-1]]) {
[_arrSelAssets removeObject:asset];
break;
}
}
[self.arrSelPhotos removeObject:_arrSelPhotosBackup[_currentPage-1]];
}
}
btn.selected = !btn.selected;
[self getPhotosBytes];
[self resetDontBtnState];
[self resetEditBtnState];
}
ZLThumbnailViewController覆盖以下方法
- (BOOL)canAddModel:(ZLPhotoModel *)model
{
ZLImageNavigationController *nav = (ZLImageNavigationController *)self.navigationController;
ZLPhotoConfiguration *configuration =nav.configuration;
// 非混合选择
ZLPhotoModel *smmm = nav.arrSelectedModels.firstObject;
// 最多选择图片数
if (configuration.allowMixSelect==NO && (smmm.type==ZLAssetMediaTypeGif||smmm.type==ZLAssetMediaTypeImage)) {
if (nav.arrSelectedModels.count >= configuration.maxSelectCount) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxSelectCountText), configuration.maxSelectCount);
return NO;
}
}
if (nav.arrSelectedModels.count > 0) {
ZLPhotoModel *sm = nav.arrSelectedModels.firstObject;
if (!configuration.allowMixSelect &&
((model.type < ZLAssetMediaTypeVideo && sm.type == ZLAssetMediaTypeVideo) || (model.type == ZLAssetMediaTypeVideo && sm.type < ZLAssetMediaTypeVideo))) {
ShowToastLong(@"%@", GetLocalLanguageTextValue(ZLPhotoBrowserCannotSelectVideo));
return NO;
}
}
if (![ZLPhotoManager judgeAssetisInLocalAblum:model.asset]) {
ShowToastLong(@"%@", GetLocalLanguageTextValue(ZLPhotoBrowseriCloudPhotoText));
return NO;
}
if (model.type == ZLAssetMediaTypeVideo && GetDuration(model.duration) > configuration.maxVideoDuration) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxVideoDurationText), configuration.maxVideoDuration);
return NO;
}
// 最多选择视频数
if (configuration.allowMixSelect==NO && smmm.type==ZLAssetMediaTypeVideo) {
if (nav.arrSelectedModels.count >= configuration.maxVideoSelectCount) {
[MBProgressHUD showError:[NSString stringWithFormat:@"最多只能选择%ld个视频", (long)configuration.maxVideoSelectCount]];
return NO;
}
}
return YES;
}
ZLPhotoActionSheet覆盖以下方法
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
ZLCollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ZLCollectionCell" forIndexPath:indexPath];
ZLPhotoModel *model = self.arrDataSources[indexPath.row];
@zl_weakify(self);
__weak typeof(cell) weakCell = cell;
cell.selectedBlock = ^(BOOL selected) {
@zl_strongify(self);
__strong typeof(weakCell) strongCell = weakCell;
if (!selected) {
//选中
// 非混合选择
ZLPhotoModel *smmm = self.arrSelectedModels.firstObject;
// 最多选择图片数
if (self.configuration.allowMixSelect==NO && (smmm.type==ZLAssetMediaTypeGif||smmm.type==ZLAssetMediaTypeImage)) {
if (self.arrSelectedModels.count >= self.configuration.maxSelectCount) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxSelectCountText), self.configuration.maxSelectCount);
return;
}
}
if (self.arrSelectedModels.count > 0) {
ZLPhotoModel *sm = self.arrSelectedModels.firstObject;
if (!self.configuration.allowMixSelect &&
((model.type < ZLAssetMediaTypeVideo && sm.type == ZLAssetMediaTypeVideo) || (model.type == ZLAssetMediaTypeVideo && sm.type < ZLAssetMediaTypeVideo))) {
ShowToastLong(@"%@", GetLocalLanguageTextValue(ZLPhotoBrowserCannotSelectVideo));
return;
}
}
if (![ZLPhotoManager judgeAssetisInLocalAblum:model.asset]) {
ShowToastLong(@"%@", GetLocalLanguageTextValue(ZLPhotoBrowseriCloudPhotoText));
return;
}
if (model.type == ZLAssetMediaTypeVideo && GetDuration(model.duration) > self.configuration.maxVideoDuration) {
ShowToastLong(GetLocalLanguageTextValue(ZLPhotoBrowserMaxVideoDurationText), self.configuration.maxVideoDuration);
return;
}
// 最多选择视频数
if (self.configuration.allowMixSelect==NO && smmm.type==ZLAssetMediaTypeVideo) {
if (self.arrSelectedModels.count >= self.configuration.maxVideoSelectCount) {
[MBProgressHUD showError:[NSString stringWithFormat:@"最多只能选择%ld个视频", (long)self.configuration.maxVideoSelectCount]];
return;
}
}
if (![self shouldDirectEdit:model]) {
model.selected = YES;
[self.arrSelectedModels addObject:model];
strongCell.btnSelect.selected = YES;
}
} else {
strongCell.btnSelect.selected = NO;
model.selected = NO;
for (ZLPhotoModel *m in self.arrSelectedModels) {
if ([m.asset.localIdentifier isEqualToString:model.asset.localIdentifier]) {
[self.arrSelectedModels removeObject:m];
break;
}
}
}
if (self.configuration.showSelectedMask) {
strongCell.topView.hidden = !model.isSelected;
}
[self changeCancelBtnTitle];
};
cell.allSelectGif = self.configuration.allowSelectGif;
cell.allSelectLivePhoto = self.configuration.allowSelectLivePhoto;
cell.showSelectBtn = self.configuration.showSelectBtn;
cell.cornerRadio = self.configuration.cellCornerRadio;
cell.showMask = self.configuration.showSelectedMask;
cell.maskColor = self.configuration.selectedMaskColor;
cell.model = model;
return cell;
}