Post title can be a little bit weird but here's what I'm looking forward to do:
Look at the image in the middle, it's displaying only a part of the original image. It's still high definition, not really cropped but only masked with the center of the image at the center of the view.
So basically they put a bigger image behind a smaller view (I did that for having circular imageviews in the past). But how can I achieve that particularly?
Is there any cocoapods or something to do so or should I get started doing it myself? Any suggestions on how to code-wisely build this?
The main goal here is to keep a static space to display images so they're always the same width/height. Doing this effect seems like a good way of achieving this.
EDIT: Here's a little sketch of an idea I just had to mimic that behavior:
Thanks a lot and have a nice day.
If you're asking what I think you're asking, you don't have to look far to find this functionality. Use UIView's built in contentMode property, specifically in this case, UIViewContentModeScaleAspectFill.
[imageView setContentMode:UIViewContentModeScaleAspectFill];
Then to crop of the parts of the image extending out of the frame, be sure to use clipsToBounds:
[imageView setClipsToBounds:YES];
Here is another solution, but make sure your image width and height is greater than the imageview,
imageView.contentMode=UIViewContentModeCenter;
imageView.clipsToBounds=YES;
imageView.clearsContextBeforeDrawing=NO;
Related
I've seen many solutions out here but they're not exactly what I'm looking for. What I'm attempting to do is have the view's background to move an image multiple times-- slowly and diagonally rather than horizontally or vertically.
From a web designing perspective, this can be achieved with a tiled bg.gif where the image gives the effect of an image moving without additional programming.
Example:
However, I'm not sure whether this is achievable within Swift programming. I'm sure alternative solutions are out there like having a single image (a smiley face) tiled to fill the view frame and have it move diagonally by incrementing it's x & y coordinates.
I'm new to iOS development and Swift yet I am learning a lot! Much help will be appreciated.
refer this two links. it will help to achieve what you want. click here and click here
Update as advised in comment : download SwiftGif and Import the Gif.swift in your project and do the following:
// Returns an animated UIImage
let myGif = UIImage.gifWithName("imggif")
// Use the UIImage in your UIImageView
let imageView = UIImageView(image: myGif)
here imggif is your gif image which shown in question. put it in your project
hope this will help :)
Frosted Glass Effect
I'm thinking of how to approach this logically..
So we take the background image ( for example )
Then, we want to add our frosted glass button to this image. Here's how it should look..
Now I know I cannot programatically blur the background image of the button, so I'll to try and do it with two images.. Background.png and Backgorund_Blurred.png.
Now, the frosted glass effect will happen on animated objects. So, as they move across the screen, it should appear that it is blurring the background image behind it, however, to achieve this I can only think of one way. But doing so is beyond my current capability.
It would have to be a background_blurred image for the UIButton for example. No scaled in any way, and the exact same size as the normal background. Then, I would have to take the buttons relative position on the normal background and append the background_blurred of the button to suit.
My first question; is this possible?
Second question; is there an easier approach?
Lastly, I've added an image to make sense of the relative position theory.
Check out the FXBlur library, it'll let you blur images/views.. I've used it successfully and sounds like it'll do what you want.
I think having two images for these assets maybe easier, but having the views blur may be better in the long run as you wouldn't have to worry about updating the images for different resolutions in the future or care about how big the button is/will be.. Also if you want to do this with more images it'll turn into a mess with all the different images to manage.. The library is simple to use, with one call you'll have a blurred image/view..
Hello: Currently in my project, I'm using OBShapedButton to process touches on a lot of objects that overlap (it's a map with each territory its own separate object). Basically, this library prevents a touch from being processed on a transparent point on the given view.
I'm attempting to add a border effect to just the edges of the opaque part of the UIImage (and adding a semi-transparent overlay above that). Something to the effect of this:
Which can be simplified to this (example of one image):
I am currently using MGImageUtilities to color in the opaque parts of territories using this line:
[territory setImage:[[territory image] imageTintedWithColor:tint]];
The problem is that I'm not sure how to just color the borders (which can be any shape). I've looked at this link already, but haven't been able to come up with anything.
Thanks in advance for the help!
Terribly hacky, but use MGImageUtilities' UIImage+ProportionalFill with scale resizing to create a slightly larger image, UIImage+Tint to red, and stack below.
The library you are using doesn't actually specify a shape layer. It uses alpha values from the PNGs that you give it.
Could you use a different 'highlighted' or 'selected' PNG that adds the border effect you are looking for?
Otherwise, it you will have to generate a UIBezierPath from your PNG image, which sounds like a very computationally intensive operation. At that point, I might question whether this library meets your needs.
I'm really interested in creating a UIScrollView similar to the Yahoo Weather app. Here's an example on video:
http://www.youtube.com/watch?v=a-q_yetkpik
I have found this Git which will alow me to do the fade background thing:
https://github.com/justinmfischer/core-background
But how would I achieve the blur effect at the top so that as content scrolls up, it almost fades out behind the UINavigationBar
Any help would be appreciated!!
I wrote the code for the UI effects in the Yahoo! Weather app, would be happy to answer your question.
Sounds like you've figured out how to do the blur (fade between a blurred image based on pixel offset, maxing out at a certain amount... for even better effect, you can have multiple steps in the blur - i.e. fade between non-blurred to half-blurred, then half-blurred to full-blurred etc).
For the fading under kind of effect, you can set the mask property on your content view's layer:
https://developer.apple.com/library/mac/documentation/graphicsimaging/reference/CALayer_class/Introduction/Introduction.html#//apple_ref/occ/instp/CALayer/mask
The mask is an image that fades from transparent to opaque.
--Iain.
I am probably a little late for the party but I have an example project that does exactly that. I did try to look through Yahoo! app for the said image mask Iain was talking about. I have yet to be able to use it the way he described. So I created a CALayer on the fly to achieve the effect.
(#Iain, awesome job! big fan)
Here is the GitHub link
I haven't personally tried it but this might be a good start: https://github.com/kronik/DKLiveBlur
DKLiveBlur
Sources of DKLiveBlur and Demo app to show live blur effect similar to yahoo weather iOS app.
I achieved a similar effect using FXBlurView:
https://github.com/nicklockwood/FXBlurView
You simply set the blurRadius relative to the amount scrolled: scrollView.contentOffset.y
Thanks to Iain for pointing out CALayer masks.
Download the sample code for blur from Evan Davis blog.
When I am working with uiimageview, I want to rotate it with a small angle, and I did. But, in the border of uiimageview after rotating appears spikes, like a saw. I do not know why and try to fix it but I cant. Please help me.
Couple of options..
1) If you are using Core Graphics functions to rotate you can enable anti alias options
CGContextSetAllowsAntialiasing(context, true);
CGContextSetShouldAntialias(context, true);
2) Add a 1 pixel transparent border to the your image on all 4 sides.
One more thing, there is a technical term to the spikes you saw and it is aliasing. And the techniques to prevent aliasing are called anti aliasing techniques. Hope this helps.
Thanks all you guys :) My friend showed me another way to fix it. I think this way is better than using transparent border trick. He changed an attribute in info plist file, that is "Renders with edge antialisasing", to YES. And everything becomes okay :). I hope it will help someone get a same prob with me :)
Take a UIView as subView and Place UIImageView on subView.
Keep the size of subView and UIImageView Same.
Now, Use "UIViewAnimationTransitionFlipFromRight" or "UIViewAnimationTransitionFlipFromLeft" with Timer.
What you can do easily is to add a 1px transparent border around your image. So if your image is, let's say, 50x50 pixels you need to make it 52x52 such that the outer pixels are transparent. When you will rotate it should look fine now.