CTAssetsPickerController通过它来实现
pod 'CTAssetsPickerController', '~> 3.3.0'
导入文件之后，在你需要用到的页面记得引入头文件
#import <Photos/PHPhotoLibrary.h>
#import<CTAssetsPickerController/CTAssetsPickerController.h>
签协议CTAssetsPickerControllerDelegate
-(void)saveAction{
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
if (status != PHAuthorizationStatusAuthorized) return ;
dispatch_async(dispatch_get_main_queue(), ^{
//弹出控制器
CTAssetsPickerController *assetPC = [[CTAssetsPickerController alloc] init];
//隐藏空相册
assetPC.showsEmptyAlbums=YES;
//显示图片索引
assetPC.showsSelectionIndex=YES;
//显示那些资源
assetPC.assetCollectionSubtypes = @[@(PHAssetCollectionSubtypeSmartAlbumUserLibrary), @(PHAssetCollectionSubtypeAlbumRegular)];
assetPC.delegate=self;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) //如果是运行到ipad上面
{
assetPC.modalPresentationStyle = UIModalPresentationFormSheet;
}
[self presentViewController:assetPC animated:YES completion:nil];
});
}];
}
#pragma mark - CTAssetsPickerControllerDelegate -
// 限定选择的最大选择个数
- (BOOL)assetsPickerController:(CTAssetsPickerController *)picker shouldSelectAsset:(PHAsset *)asset{
NSIntegermaxNumber =9;
if(picker.selectedAssets.countreturnYES;
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:[NSString stringWithFormat:@"最多选择%ld张", (long)maxNumber] preferredStyle:UIAlertControllerStyleAlert];
[alertaddAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil]];
[pickerpresentViewController:alert animated:YES completion:nil];
return NO;
}
- (void)assetsPickerController:(CTAssetsPickerController *)picker didFinishPickingAssets:(NSArray *)assets{
//选择完毕关闭页面
[pickerdismissViewControllerAnimated:YES completion:nil];
PHImageRequestOptions *option = [[PHImageRequestOptions alloc] init];
option.resizeMode= PHImageRequestOptionsResizeModeExact;
option.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
//生成图片
for(inti =0; i < assets.count; i++){
NSLog(@"%@",[NSThread currentThread]);
PHAsset*asset = assets[i];
CGSize asseSize = CGSizeMake(asset.pixelWidth / [UIScreen mainScreen].scale, asset.pixelHeight / [UIScreen mainScreen].scale);
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:asseSize contentMode:PHImageContentModeDefault options:option resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
这里就拿到了你选择的多张图片，接下来的操作就是看你自己是显示还是需要做什么进一步的操作了。
//显示出你选择的多张图片
// UIImageView *imageView = [[UIImageView alloc] init];
//
// imageView.image = result;
// [self.view addSubview:imageView];
// imageView.frame = CGRectMake((i %3) *(100 + 10), (i / 3 * (100 + 10)), 100, 100);
//分享到微信好友、朋友圈、收藏，这三个场景是不支持多张图片的，用微信sdk来实现的话，只能是一张
// WXImageObject *imgObj = [WXImageObject object];
// NSData *imagedata = UIImagePNGRepresentation(result);
// imgObj.imageData = imagedata;
//
// WXMediaMessage *message =[WXMediaMessage message];
// message.mediaObject = imgObj;
// SendMessageToWXReq* req = [[SendMessageToWXReq alloc] init];
// req.bText = NO;
// req.message = message;
// req.scene = WXSceneFavorite;
// [WXApi sendReq:req completion:nil];
}];
}
}
当你选好几张图片之后，选择分享到朋友圈时，默认就是选择一张
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