If I'm writing an iPhone app, I have to use "#2x" suffix for devices with retina display and "#-568h#2x" for iPhone 5 apps. How should these images differ? Should I make the image with double length and height (80x40 -> 160x80)? And what about "-568h#2x"? Thank you for help!
Yes, images for retina displays are double the size of normal ones, so as you said, if you have a 80x40 image, the 2x version should be 160x80.
As for the 568, same width but the height you want to appear in a iPhone5 screen. This image is not mandatory, you can use the same image for retina screens for iPhone4 and iPhone5, this is just in case you want to have different ones, for example for the splash screen.
Related
Guys I'm facing a issue in 6s & 6s+ device... Can anyone help me with it.. I'm using auto layouts and storyboard
I'm using custom font for the entire app called San Francisco and these fonts looks good with iPhone 5s with perfect size that I'm setting in story board but in 6s and 6s+ some how it's coming in small size !
And even the images are slightly small in size ! I am having 3 sizes like (1x, 2x, 3x) that is also coming small in 6s device ! Let me give you an example like when I use a button with a image ! In story board I have a view controller of size 320 x 568. And I'm setting auto layout in that view controller and when I give image to that button ! That image appears to be small in the 6s & 6s+ device how to resolve it
You should use Assets to set images. And you should add image for all resolution like 1x,2x,3x. For example your image size is 24x24 for 1x then your 2x image should be 48x48 and 3x should be 72x72. your 6+ will use 3x resolution and all other devices will use 2x. If you are not giving support to older ios versions or devices then you can skip 1x image, But if your app support ipads also then you need 1x and 2x.
You can refer Asset Catalog Help - Apple Documentation.
Second thing you can use size classes for different size of your views and your fonts according to different screen sizes.
Mostly every iOS application has a view with an image as background. Is there any image sizing guide out there? For example here is an iOS screen designed in Sketch:
As you can see there is a background image. Now there are lots of Apple devices every application should support. The new iOS 10 supports all devices from iPhone 5 to iPhone 6s Plus. They have different screen sizes and resolutions. When creating Xcode assets, I am giving 3 background images with different sizes - #1x, #2x, #3x. What sizes should they be?
The way I see it you have 2 options:
In here you will find the resolutions of the iPhone's:
You don't need the #1 image since you don't support iPhone 4 and 4s (iOS 10).
#2 is for iPhone 5,5c,5S,6 and 6s so basically you can create #2 image of the highest resolution which is the iPhone 6 and this image will work well for the iPhone 5 family.
Or, you can create an image with resolution for each iPhone and using hard coded logic set the image for each phone.
i.e: if iphone5c { setImage("iphone5cImage") } etc etc..
The simplest solution is to create 1 image with the highest resolution. The #3 is the highest for the iPhone 6S+ and it will look amazing for the rest. Don't forget to set the image view as aspect fill.
Also, don't forget to check this thread: How to handle image scale on all the available iPhone resolutions?. It will give you clues of what exactly you are dealing with. TL;DR, It's the options I wrote.
The background images you only need to give are #2x and #3x, because #1x devices are now long gone in the dusty pages of history.
Speaking of #2x and #3x, the image resolutions you give to the developer should be the same with the highest resolution iPhone that uses that given size.
For #2x, that is the iPhone 6, which is 750x1334, and for #3x, the iPhone 6+ which is 1242x2208.
Down-scaling shouldn't be a problem because the aspect ratios of all iPhones that support iOS 10 are the same(16:9).
Note for Developer(s):
The UIImageView will then down-scale the images appropriately,
provided:
1. you created an image set with the provided #2x and #3x images,
2. correctly constrainted the UIImageView to the edges of the superview, and
3. selected the Content Mode of the UIImageView as Scale to Fill or Aspect Fill.
There is design nuance in full size background images. Mostly if the scale aspect fill good enough for different sizes you need to design only for the biggest device size after that the rest of them scale to fit. Sometimes some part of background needs to remain visible or if want to keep a low memory footprint for small device sets you need to create smaller alternatives.
Whenever you make a decision with the design size of asset you need to create #3x,#2x variants.
One more thing I need to point out about vector designs. If your design is made only with vectors you can choose pdf vector export. Storyboards can accept vector assets and they are doing very good when scaling in full backgrounds.
I use background images in my Apps. To solve this problem I use one image that has the resolution to cover all iPhones and all the iPads except the large one.
The image size is 2048x2048 points or 1024x1024 pixels at #2x to cover the 9.7 inch iPad.
The image is compressed JPG to keep the size down. Note that I allow it to scale for iPhone 6 Pluse (#3x) and 12.7 inch iPad Pro (#2x) as the quality doesn't seem to be affected.
I can justify the scaling for the larger devices, because if I provided image for the 12.7 inch iPad Pro, it will be 5464x4096 points (#2x) and 2732x2048 pixels and then the JPG compression would have to be so high (if I wanted to keep the size down), that the quality of the image was low anyway compared with scaling.
If you need high quality try both JPG and PNG for comparison, because the PNG becomes very large for complex images, but gives the best quality.
If you still have the same problem then you can try this one. For this you have to add only one image with good resolution and below code..
UIImage *bgImage = [UIImage imageNamed:#"art_background_star#3x.jpg"];
CGSize screenSize = [UIScreen mainScreen].bounds.size;
UIGraphicsBeginImageContextWithOptions(screenSize, NO, 0.f);
[bgImage drawInRect:CGRectMake(0.f, 0.f, screenSize.width, screenSize.height)];
UIImage * resultImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIColor *backgroundColor = [UIColor colorWithPatternImage:resultImage];
self.view.backgroundColor = backgroundColor;
There are 3 kinds of Apple Devices (iPhone and iPad) that is
Normal device which terms to 1 pixel = 1 point#1x (Older iPhone and iPad devices)
Retina device which terms to 4 pixels(2 x 2) = 1 point#2x (iPhone 5+)
Retina iPhone6 and iPad which terms to 9 pixels (3 x 3) = 1 point#3x (iPhone6+)
For iOs 10 that will not support iPhone 4s so you only require #2x and #3x images.
As you can see above attached image iPhone 6 also support #2x Scale so use image size for #2x is of 750*1334 and for #3x is of 1242*2208 with image mode.
Take a look at the page on documentation, there is Static Launch Screen Images, and you can catch sizes from there.
You can get a device screen size, using
CGSize screenSize = [UIScreen mainScreen].bounds.size // (Objective-C)
let screenSize: CGSize = UIScreen.mainScreen().bounds.size // (Swift)
And after you can programmatically select an image you want, from set of an images from the bundle. Or to make a big one image for resizing, using knowledges from documentation, and to resize an image accordingly. Or...your choice.
Different "sizes" #2x, #3x is scale.
And here is the nice explanation.
I've a question about resolution of Iphone 6 and Iphone 6 Plus.
I would like to know something about #x2 and #x3, i really need to be sure !
If i've a fullscreen UIImageView, display on a Iphone 6(667x375 points) the size of the containing UIImage have to be 1334x750 because the size in points are 667(#x2)x375(#x2), right?
So if i understand, the UIImageView on Iphone 6Plus in fullscreen is 736x414 but the resolution is #x3 then the UIImage in the UIImageView have to be 2208x1242 because the size in points is 736(#x3)x414(#x3), no ?
Then in a general case, i only need to know what is the size of my UIImageView and if the resolution is #x2 i multiply the size x2 and if the resolution is #x3 multiply the size x3?
Guys i really need a confirmation and if i'm wrong, please, explain me why !
I'm sorry if you think my question is really stupid but i need to understand how it works.
Cordially :)
Lets go for a ride of #1x, #2x and #3x image scaling and content viewer size according to different resolutions in iPhone.
Let understand some basics first
Device Resolution
================================
iPhone 4 & 4S 640×960
iPhone 5, 5C & 5S 640×1136
iPhone 6s 750×1334
iPhone 6P 1242×2208
Resolution reference from this site.
Now if how to use images with #1x, #2x & #3x.
Lets say you have an imageView in with size of 100W x 100H, to display images properly on all the devices with appropriate resolution without stretching or pixelation your image, one need to create 3 set of images as below according to device.
iPad 2, iPad mini supports #1x images, required image of size 100x100(WxH)
iPad, iPad mini supports #2x images, required image of size 200x200(WxH)
iPhone 4S, 5 & 6 supports #2x images, required image of size 200x200(WxH)
iPhone 6P supports #3x images, required image of size 300x300(WxH)
Though your UIImageView size is 100x100 for all the devices, but image displayed in different devices is different according to their resolutions.
Following size Table will give you more clarification, read more about it in apple documentation here
I hope it clears confusion about different resolution images for different devices :)
We are trying to make an app for all devices ,designing it on code only.
I could see that the suffix are :
#2x~ipad for ipad retina
#2x for iphone5 and iphone6
#3x for iphone6+
But there is something that i dont get, how is that the files for iPhone5 and 6 have the same suffix and the same name ? these images should be in a different size, and so you cant give them the same name ?
We have created images for iPhone6 with #2x and they seems great on the iPhone6 simulator, but on iPhone5 things dont look good and cover each other .
Cant you separate these files with a different suffix?
I have read this :
Image resolution for new iPhone 6 and 6+, #3x support added?
It is because iphone 5 and iphone 6 (not including the plus) have the same pixel density.
So basically a 40x40 image will look the same on both screens and will take the same space. You will just have to adjust positions to cover for the extra space on the iphone 6 screen.
Images for the iPhone 5 and iPhone 6 are the same size, and the same DPI. So they share the same suffix (#2x). They don't need to be separated.
#3x is for the iPhone 6+ because it has a higher DPI and a larger size than the other phones. Please refer to the Human Interface Guidelines for Images.
You should be using layout to determine how your UI elements are laid out on the screen, and you should be using Auto Layout to make sure they look right on all devices, independent of aspect ratio.
The #2x, #3x image sizes refer to device families grouped by resolution. iPhone 5 and 6 are in the same family, and iOS will use the #2x image for both. The size and placement of the UI element which uses that image, however, has nothing to do with the size of the image itself.
We want to support iOS 6 through iOS 8. By my count, that means we need to create ten launch images.
portrait 2x3: 320x480 640x480
portrait 9x16: 640x1136 750x1334 1242x2208
portrait 3x4: 768x1024 1536x2048
landscape 16x9: 2208x1242
landscape 4x3: 1024x768 2048x1536
What I wish is that I could just generate the largest sized image at each ratio, and that iOS would just downsample the image for the other sizes. That would save me from adding five more launch images to my app, a nice savings in download size.
Is it possible to use the new feature of Xcode 6 to replace my launch images with storyboards (aka UILaunchStoryboardName) to do what I want?
It seems pretty close, but I can't figure out how to say, "At 2x3, use image X; at 9x16, use image Y; at 3x4, use image Z" and so on. Size classes don't seem to let me express that concept cleanly. (Or do they?)
Here is one way to do this... Create a new image set in your existing or some new assets catalog. By default, the Devices field of the new image set, in the right pane, will be set to Universal, and so you should see three image wells in the main view: 1x, 2x, and 3x. What you want is to set the Devices field to Device Specific, then check iPhone, Retina 4-inch, and iPad underneath that field. Then, you will now see six images wells. There are four for iPhone: 1x, 2x, Retina 4 2x, and 3x. There are two for iPad: 1x, and 2x. Now, all you have to do is to drag your versions of the same splash image in various device-specific sizes, into the appropriate image wells. Once you are done, go to your launch screen XIB, which by default is set to Any width and Any height, and add a UIImageView, setting the image to have the same name as the image set you just created. Adjust the image to have the same size as the enclosing view, adding top, leading, bottom, and trailing constraints with a constant value of 0, so that the image size adjusts with the view size, regardless of the device. Run the app on your device and you should see the correct splash upon launch. You can set a breakpoint at the top of your AppDelegate code, e.g. right underneath the var window: UIWindow? declaration (or equivalent if using Objective C), so you can verify the splash on different kinds of device. Note that the image may not work in the Simulator, so try on a device. I guess that it is a bug in the Simulator, or unimplemented feature.
One thing I am not sure about is where to specify the image for iPhone 6. It seems that there are device specific image wells only for iPhone pre-4s, iPhone 4s, iPhone 5, iPhone 6 Plus, iPad, and iPad Retina sizes.