I have a general question about how images are displayed on iphone
For example iphone 5, 5s support 320x568 points or 640x1136 pixles.
If I want to create 4 images all same size to take the whole screen when rendered in 5s portrait mode, can I say each image should be 160x284 pixels?
Now what if the same app is now rendered in 4s or 6? How the images are displayed? Those 4 160x284 images are still taking the whole screen?
Thanks
Yes the images can scale to take up the whole screen but will appear blurry. If you want the images to be crisp you will need to create 3 different versions for the 3 different pixel densities (iPhone 2-3, iPhone 4-5, iPhone 6). The general convention is to name your assets like this:
image.png
image#2x.png
image#3x.png
Here's a handy guide I use that explains how things are rendered on the different models.
Related
While developing an iOS app I invested a lot of time in making everything adaptive (size-classes and so on). I have implemented an few image scrollers / photo galleries that are screen wide and zoomable. What is the best practice related to multi-screen image storage and exposure?
It is not a problem to store or generate on the fly, let's say, five different resolutions for every image and load the best resolution depending on network connection and screen size. I want to know what is recommended for this sort of diversity.
This is a (perhaps incomplete) list of all the possible image resolutions based on screen size:
iPad landscape & portrait: 704px wide
iPad 2/3: 694px wide
iPad 1/2 landscape: 507px wide
iPad 1/2 portrait: 438px wide
iPhone 6+: 414px wide
iPhone 6: 375px wide
iPhone 4/5 + iPad split screen right-side: 320px wide
All my images are square. So height equals width.
Do I include retina photos or should I use #1x for photos? Do I add extra pixels for the zooming (1.5x max)?
This is are basically the current resolutions for iOS Devices.
Basically in the retina devices you need to provide #2x images if you want them to appear not pixelated. Also in the iPhone 6 Plus and 6s Plus you will need to provide #3x images.
In the following links you can find more information about it.
http://ivomynttinen.com/blog/the-ios-design-cheat-sheet-volume-2/
http://www.idev101.com/code/User_Interface/sizes.html
I'm a bit confused here. If, say, I want to set an image as background (full screen) for my ios app (iphone), what are the sizes for the image I have to make? I googled and found no clear answer yet.
Using image assets gives no explanation either. I tried creating new image set, it just shows 3 slots for 1x, 2x, and 3x. How the xcode differentiate between what image to use for iphone 5 and iphone 6 (different ratio)?
EDIT
I seem to be unclear about my question. If the image for iphone 5 and 6 is the same, doesn't the aspect ratio differ? It will be stretched on one device or vice versa on the other and I don't want that. Back before the iphone 6, I just create image .png, #2x.png, and -568h#2x.png with the size 320x480, 640x960, and 640×1136. So my question is, for iphone 6 and 6+, what is the naming and size for my images?
If, say, I want to set an image as background (full screen) for my ios app (iphone), what are the sizes for the image I have to make?
You can use [UIScreen mainScreen].bounds's width & height to setup your view frame.
it just shows 3 slots for 1x, 2x, and 3x
They're not used for handling ratio of displaying, just for display solution (retina or not). You can just use xxx.png in your code, and it'll choose to use xxx#2x.png or xxx#3x.png appropriately.
How the xcode differentiate between what image to use for iphone 5 and iphone 6 (different ratio)?
UIImageView has an instance method called -setContentMode:, you can use UIViewContentModeScaleAspectFill mode for displaying in different devices w/ different ratio, i.e., some parts will be cut off.
This link should give you an overview of the differences between the 1x, 2x and the 3x image assets which we get once we create a new image asset.
http://9to5mac.com/2014/08/29/support-for-3x-image-assets-found-in-latest-ios-8-beta-ahead-of-larger-display-iphone-6/
Also when you create a new image asset, you can select image for specific devices such as (iPhone and iPad), if you are only developing for certain devices.
Select the devices as "Device Specific" from the Image Set Shown on the right side of the image.
As for you question, iPhone 5 and iPhone 6, xcode will take the same image assets i.e. 2x, for iPhone 6 Plus it takes the 3x image.
App Icon and Launch Image
Now for the App icon and the Launch image, this following link will guide you through.
http://www.iphonelife.com/blog/31369/unleash-your-inner-app-developer-managing-images-xcode-5-asset-catalogs
https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html
for the launch image there are different options available, such as you can individually set images for the landscape and portrait images for different devices.
I simply want to display a title page to a game. I want to use pre-rendered images. It needs to work with all iPhones and iPads. So far I am using these assets as screenshot below
I have used these sizes:
In 1x place image with resolution of 320 x 480.
In 2x place image with resolution of 640 x 960.
In Retina 4 2x place image with resolution of 640 x 1136.
In 3x place image with resolution of 1242 x 2207.
Only the iPhone 4 and 5's show correctly. Both 6 and 6Plus are completely wrong.
for iPad:
1x image of 760*1024
2x image of 1536*2048
Only the iPad 2 displays correct. The Air and Retina are completely wrong.
I have read through all the documentation I can find both on here and searching for hours on Google. I am unsure what simple thing I must be overlooking. Am I trying to do something that is not possible? I am only testing on the simulator and thinking it could be an issue with that?
Also I may have a misunderstanding then as I was under the impression that #3x was for iPhone 6 and 6+. If not, what are #3x for?
For some reason Image Sets in Asset Catalogs do not include a size for iPhone 6 or iPhone 6+, so when using a full screen image you may need to handle it manually via code.
What I'm doing (and it's not pretty but it works), is to include another Image Set for iPhone 6 (I all it imageName_47), and another one for iPhone 6+ (I call it imageName_55). Then in code, detect the screen size and swap the image to the best size. You'll only need the #2x version for the _47 one, and the #3x version for the _55 one.
Currently working on a universal SpriteKit project. I'll be supporting the following devices:
iPhone 4/s,
iPhone 5/c/s,
iPhone 6,
iPhone 6+
iPad non-ret,
iPad retina
I am confused on the iPhone part. I already have 4 versions for my background sprite for the 4 different screen resolutions of the iPhones. But which goes to which?
I know the 3x is for the 6+, and I think the 5/c/s goes to the Retina 4 2x, but I do not know where the iPhone4/s, and 6 go. Anyone know?
Side note, when I create a Launch Image inside my xcassets file, I am shown these options, which basically has all the device I am supporting. Just wondering why this is not also the case when creating an Image Set
Also how do you guys approach creating images/sprites for a universal application? Now that the new iPhone 6, and 6 plus are out, I have 2 more resolutions to support which is still confusing for me as I'm still a beginner.
This is a little confusing - here's how I understand it (this is in reference to the top image):
1x images are for the original iPhone through the 3GS - 'standard' resolution devices (3.5" screens)
2x images are for the iPhone 4 and 4S (3.5" Retina screens) and are also used for the iPhone 6.
Retina 4 2x are for the iPhone 5 and 5s (4" Retina screens)
3x images are for the new iPhone 6+ (5.5" super-Retina [3x] screen)
I believe that the iPhone 6 (4.7" screen) will use the Retina 4 2x images, but I would have to test it.
Side note, when I create a Launch Image inside my xcassets file, I am shown these options, which basically has all the device I am supporting. Just wondering why this is not also the case when creating an Image Set
If you compare the two images, the lower one has everything the upper one does, except for a 1x iPhone graphic. You don't need that if you're only supporting iOS 7 and above, since iOS 7 doesn't run on any non-Retina phone-form devices. To be honest, I don't understand why the top image has a 1x iPhone form graphic option - maybe because you checked the "iPhone" box in the sidebar?
Also how do you guys approach creating images/sprites for a universal application
For most non-fullscreen images (like a logo), you really only have 3 resolutions to support - standard (1x), Retina (2x), and the iPhone 6+ (3x). These are simply different quality of images, not really different sizes. So if you have a 10x10 image on a standard device, that would mean you need a 20x20 image on a Retina device and a 30x30 image on an iPhone 6+. On all devices, they would show up as a 10x10 image.
A great tool I used for managing different resolutions of icons is iConify.
I create them at the highest size I need (30x30 [#3x] for an image I want to be 10x10 on a device), then save it as a png and resize copies to 20x20 [#2x] and 10x10 [standard]. A better solution would be to create and use vector graphics, which would resize better to any size.
In 1x place image with resolution 320 x 480.
In 2x place image with resolution 640 x 960.
In Retina 4 2x place image with resolution 640 x 1136.
in 3x place image with resolution 1242 x 2208.
Images of Retina 4 2x will upscale to resolution 750 x 1334.
Images 3x will downscale to resolution 1080 x 1920.
You can also visit this links for launch screen images:
http://www.paintcodeapp.com/news/iphone-6-screens-demystified
http://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutions
For all other images resolution and size:
https://developer.apple.com/ios/human-interface-guidelines/graphics/launch-screen/
https://developer.apple.com/ios/human-interface-guidelines/graphics/image-size-and-resolution/
https://developer.apple.com/ios/human-interface-guidelines/graphics/custom-icons/
How to use Image.xcassets:
https://www.youtube.com/watch?v=_36Y6rDcKP0&list=PLXCowKcXAVgrCe2Lezv0acRf4adQLshv2
Hope this will be more helpful.
If you have your launch images in an xcasset file, you can do the following in Xcode 6.
Select the launch image asset, select a specific resolution (1x, 2x, Retina 4, etc) and open the attributes inspector (see image below).
Under the "Image" section, you will have a "Expected Size" attribute.
Inside images.xcassets, you can add different devices support by right clicking as shown in the snap
Edit: Well, it doesn't seem working when I drag n drop images to placeholders. It gets messed up as shown next
I don't know why it is acting odd on my Xcode 6.4 though.
Edit#2:
I see a bug from apple here. I can select 'Universal' along with any device upon right click as you can see in the first image above. But via attribute inspector I can correctly select either 'Universal' or specific devices as shown here
Edit#3:
In Xcode 7 the attribute inspector has been changed and now it gives option same like the right click. So instead of either 'Universal' or specific devices, now it offers to select all.
There is one tool : AVXCassets Generator with which you can directly generate XCAssets file for all your icons and images just by one click.
hope you will like it.
So I have a game that I made in Swift and I built it and all of its assets for the iPhone 5s. So naturally when built for a 4s or an iPad the game looks distorted and the image views are in the wrong place.
How do I get around this so that the game can work on both the 4/4s and 5/5s? Where do I put the smaller images? I see the 1x and 2x but what exactly does this mean?
Every iPhone since the iPhone 4 in 2010 has a Retina Display. Now we have iPads with Retina Display, too.
You can have an asset named "image1.png" and a higher resolution version of the same asset named "image1#2x.png". Adding the "#2x" to the end of the file name, iOS knows which asset to use based on the current device's display.
Regarding your "So naturally when built for a 4s or an iPad the game looks distorted and the image views are in the wrong place" comment: what you want to pay attention to here is the actual screen size of the devise you're designing for.
The iPhone 4/4S has a screen resolution of 640 x 960 pixels, while the iPhone 5/5c/5s has a screen resolution of 640 x 1136. The iPad's screen resolution for Retina Display models is 2048 x 1536.
So, I think that your problem is not about creating the assets, but about how you arrange them on screen.
I'd recommend taking a look into an AutoLayout tutorial.
Hope I've shed some light on your problem.