uiimageview

问题 I have post response i want to download image from image_path let fileUrl = NSURL(fileURLWithPath: (posts.value(forKey: "image_path") as! [String])[indexPath.row]) print(fileUrl as Any) // here i can get path if FileManager.default.fileExists(atPath: (fileUrl)// nil value { let url = NSURL(string: (posts.value(forKey: "image_path") as! [String])[indexPath.row]) // Here url found nil let data = NSData(contentsOf: url! as URL) cell.LocationImage?.image = UIImage(data: data! as Data) } UPDATE:

问题 In Xcode 5.0.2 I create a blank single view app for iPhone, then add a "male.png" image to the project, drag a UIImageView to the storyboard and finally add the following code to the viewDidLoad : _imageView.image = [UIImage imageNamed:@"male.png"]; This works well: Then I add the 4 files from JMImageCache project and change the ViewController.m to: #import "ViewController.h" #import "JMImageCache.h" static NSString* const kAvatar = @"http://gravatar.com/avatar

问题 I was following this great tutorial at ray wenderlich's site about creating a simple drawing app with UIKit. http://www.raywenderlich.com/18840/how-to-make-a-simple-drawing-app-with-uikit the tutorial is great and everything is working. the problem that I have is that when it came to creating the eraser functionality the solution proposed by ray was to use the brush with the same color that the background has. To me this doesn't seem like a great solution. what if the background is not a

问题 I understand the difference between frames and bounds I think, bounds are to the view's local coordinate system, while frames are to the superviews. With scrollviews however, I'm a little confused. When I have a UIImageView in a UIScrollView and pinch to zoom it larger, it seems the frame grows larger (width and height) increases the width and height of the corresponding UIImage as well. However, it seems like the bounds of the UIImageView don't change at all. Why is this? How do scroll views

问题 I am loading a UIImage of size 2480 × 3508 into UIImageView using UIViewContentModeScaleAspectFit. I am getting memory warning while loading this image. And after i loaded a few images of this size in this UIImageView the application crashes. Is there any method to solve this. 回答1: Solution to this problem consists of either loading scaled version of the image (*1) or you have option to display it in full resolution with help of CATiledLayer(*2). [UIImage imageWithCGImage:scale:orientation:];

问题 I am trying to choose and display multiple images (approx. 5 images) but for some reason I am only able to select and display a single image at a time. I have tried to implement the below code for displaying multiple images. Please help guys. Thanks in advance. import UIKit import Alamofire class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate { let imagesData = [UIImage]() @IBOutlet weak var myImageView: UIImageView! @IBOutlet weak var

问题 I'm fairly new to swift and I'm currently trying to display multiple image views within a custom UITableCell. Ideally, I would like to have each image be scaled so that its width fills half of the screen size (while preserving the original aspect ratio). The idea is that each UITableCell will have a collage of 3 images and some additional information in a UILabel -- the tallest image would sit in its own column with the smaller two stacked right next to the tallest. Below is a screenshot to

问题 I want to make a ripple effect on a UIImageView upon receiving the user touch. How can i do this. Opengl is a good option. But on which part of opengl should i need to concentrate. I am new to opengl. 回答1: I'd suggest you check out cocos2d: http://www.cocos2d-iphone.org/ https://github.com/cocos2d/cocos2d-iphone It has a built-in ripple effect. There is sample code in their source under /tests/EffectsTest.m 来源： https://stackoverflow.com/questions/6353403/ripple-effect-on-the-touch-event

问题 Looking at this question: Prevent UIScrollView from moving contents to top-left, i'm having the exact issue. I'm using this tutorial: http://cocoadevblog.heroku.com/iphone-tutorial-uiimage-with-zooming-tapping-rotation Back to the similar question, if i disable the UIScrollViewPanGestureRecognizer, i'm not able to pan the zoomed image anymore. I have a UIImageView within a UIScrollView, and i want to be able to zoom and pan the image as well. How can i do tho disable the contents moving to

问题 Looking at this question: Prevent UIScrollView from moving contents to top-left, i'm having the exact issue. I'm using this tutorial: http://cocoadevblog.heroku.com/iphone-tutorial-uiimage-with-zooming-tapping-rotation Back to the similar question, if i disable the UIScrollViewPanGestureRecognizer, i'm not able to pan the zoomed image anymore. I have a UIImageView within a UIScrollView, and i want to be able to zoom and pan the image as well. How can i do tho disable the contents moving to