YSHYAssetsPickerDemo 介绍
相册多选功能实现，在需要调用相册的地方，添加如下代码即可：
YSHYAssetPickerController *picker = [[YSHYAssetPickerController alloc]initWithNumber:5 andHasSelectedImags:dataSource];//最多只能选5张 并传入已经选好的图片数组
picker.assetsFilter = [ALAssetsFilter allPhotos];
picker.showEmptyGroups = NO;
picker.pickerDelegate = self;
picker.selectionFilter = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject,NSDictionary *bindings){
if ([[(ALAsset *)evaluatedObject valueForProperty:ALAssetPropertyType]isEqual:ALAssetTypeVideo]) {
NSTimeInterval duration = [[(ALAsset *)evaluatedObject valueForProperty:ALAssetPropertyDuration]doubleValue];
return duration >= 5;
}else{
return YES;
}
}];
[self presentViewController:picker animated:YES completion:^{
}];
实现其代理方法：
-(void)assetPickerController:(YSHYAssetPickerController )picker didFinishPickingAssets:(NSArray )assets {
[dataSource removeAllObjects]; [dataSource addObjectsFromArray:assets]; [self CreatImageViewWithImags:dataSource];
}