I need some advice. In my application people can upload images. I will store the images on a server. I want to make a photo gallery where you can see all uploaded images. Every user has a account. And it will download all uploaded images.
The point is that when you uploaded 1 image it has to download 1 image. But when you upload 10 or more the app will have to download all images and cache the images to your device.
What is the best way to download all images and keep the app running without getting stuck. Also what is the best way to cache all images.
If you want to create some photo gallery apps, check out this open source sample.
Created by Michael Waterfall, which includes photo gallery from images stored on server or locally.
You can modify the code as per your project requirements. And it is easy to handle the images.
Related
Is it possible to download images from a web server and save them in such a way that
[UIImage imageNamed:#"filename"]
would still work for filename.png and filename#2x.png just as if they had been sent along in the application package all along?
Adding my comment as an answer. You can try to send the scale based on retina/non-retina and then download a single image based on that. You dont need to worry about combining two images and downloading since a device can be either retina or non-retina only. You dont need both images at the same time.
You can download the images based on retina/non-retina of the device itself. No need to keep both in the same device.
As you are considering downloading both images, so bandwidth per se is not of concern, why not combine the two images into a multi-resolution TIFF and download that from the web server? If you do that and load the image from the file the correct resolution will be picked automatically.
I've been trying to get my app's tile to display an image from the web, but couldn't get it to work. I then tried the Tiles and Badges app sample, where in scenario 3 you can send a tile notification that uses a web image. No matter which image url I paste in the text box, the tile refuses to get updated. So apparently, the sample isn't working either, or something is very wrong.
The images are all smaller than 1024x1024 and less than 200KB. Fun fact: if I download one of the images I unsuccesfully tried to feed the sample, add it to the project and then send a notification using it as a local image, the tile gets updated. So apparently the image isn't the problem.
Has anybody been able to get this working? I don't get what I'm doing wrong.
Do have internet permission ticket in app manifest? Maybe only your app dont have permission to download your image from web.
I'm developing a simple web app and I just want to allow the user to upload some pictures.
should I just store the picture url on my database table or should I upload the whole picture?
how can I validate the size of the picture being uploaded?
how can I upload the picture from my controller?
thank you all!
I would NOT store the image data in the database. I would create a Behavior that will upload the image to the image directory and store a reference to that image. The behavior can then handle size, mime type, etc. Then add a file upload form to the controller and when the data goes to the model to be saved, it will automatically upload the image and put it where it goes.
If you do not want to build your own, here is a very popular behavior that someone has built.
https://github.com/jrbasso/MeioUpload
Or you could try this simple way of doing it (check the readme.md file) :
https://github.com/malikov/cakephp2.0-image-upload
I'm developing an application and I'd like to list the images present in the "Documents" directory of my application (to load images using iTunes) and I'd like to list the images and photos taken by the Camera as well.
And I do know about UIImagePickerController, but I don't need that. I want to integrate the photos and the loaded application images in the same place. But I can't find any information about where can I find all the device camera photos.
Thanks in advance
You can access all the photos stored in the photo library using the Assets Library Framework. Check out the documentation here:
https://developer.apple.com/library/ios/#documentation/AssetsLibrary/Reference/AssetsLibraryFramework/_index.html
Specifically, you want to use ALAssetsLibrary's enumerateGroupsWithTypes:usingBlock:failureBlock: to enumerate the ALAssetsGroupSavedPhotos type, and enumerate the photos in that group with ALAssetGroup's enumerateAssetsUsingBlock:.
Some links with sample code:
http://www.icodeblog.com/2010/07/08/asset-libraries-and-blocks-in-ios-4/
http://www.fiveminutes.eu/accessing-photo-library-using-assets-library-framework-on-iphone/
I am working on an app for iPad where I want to have lets say 100 jpg's in a folder.
They could be named like 01.jpg, 02.jpg etc.
In my app I like to browse those images and when clicking on one of them I need the name of the image to be able to send some data over the network (the data part works fine).
I tried to use UIImagePicker but I found out there are no name connected to the actual image.
Then I made another approach where I have a number of pages where I have buttons and here I load in the images which works fine as long the are a part of the recourse of the project...
But here comes the real problem.
The user of the app should be able to change those images over time without recompiling the app.
So I do look for a way to have a folder where the user can place/replace images with the names 01.jpg etc and the app to use those updated images.
Ideas are very welcome.
Wiljan
I am not sure that I understand what you mean, but You can save images in your application documents folder. You can find more details at:
http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/StandardBehaviors/StandardBehaviors.html#//apple_ref/doc/uid/TP40007072-CH4-SW6
You can also use NSFileManager to copy files.
what I suggest to do is :
put default images on project resources.
At first start, copy files to documents folder.
always use images from documents folder.