uiimageview

问题 When Image data is returned and applied to a UIImage, if the data comes from the camera then the image appears rotated 90 degrees. I tried adding the extension UIImage { func correctlyOrientedImage() -> UIImage { if self.imageOrientation == UIImageOrientation.up { return self } UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale) self.draw(in: CGRect(origin: CGPoint(x: 0,y :0), size: CGSize(width: self.size.width, height: self.size.height)) ) let normalizedImage:UIImage =

问题 I have an ImageView on a UIView. I'm trying to move view keyboard size but all content move properly instead of UIImageView. -(void) keyboardWillShow:(NSNotification *) notification { NSDictionary* keyboardInfo = [notification userInfo]; // Work out where the keyboard will be NSValue* keyboardFrameBegin = [keyboardInfo valueForKey:UIKeyboardFrameBeginUserInfoKey]; CGRect keyboardFrameBeginRect = [keyboardFrameBegin CGRectValue]; // Work out animation duration NSTimeInterval animationDuration

问题 Interested in creating by own analog clock application - anyone know of some example project/code that implements an analogue clock? (i.e. not a digital clock). Ideally with a custom background, and custom hour/minute hands as images? I note that the following link exists, however was hoping for something just a little more specific to matching what I'm doing (background image, images for the hour/minute hands): Example Code 回答1: Create a background image, and images for each of the hands

问题 I've been trying to use the appearance proxy API to apply some default colors to some controls, but I've run into a problem. When I apply a tint color to UISegmentedControl using something like... UISegmentedControl.appearance().tintColor = UIColor.red It generates this... All good, but when I add... UIImageView.appearance().tintColor = UIColor.green it changes to... Just to be clear, I have BOTH this lines in my code UISegmentedControl.appearance().tintColor = UIColor.red UIImageView

问题 I'm scaling UIImageView and then reverting it using UIView animateWithDuration with UIViewAnimationOptionAutoreverse option. The problem is the image animation is a little bit jaggy (twitching) at the end of the animation. Here's my code: [UIView animateWithDuration:0.25 delay:0 options:UIViewAnimationOptionAutoreverse animations:^{ myImage.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);} completion:^(BOOL finished){if (finished){ myImage.transform =

问题 I'm scaling UIImageView and then reverting it using UIView animateWithDuration with UIViewAnimationOptionAutoreverse option. The problem is the image animation is a little bit jaggy (twitching) at the end of the animation. Here's my code: [UIView animateWithDuration:0.25 delay:0 options:UIViewAnimationOptionAutoreverse animations:^{ myImage.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);} completion:^(BOOL finished){if (finished){ myImage.transform =

问题 I'm scaling UIImageView and then reverting it using UIView animateWithDuration with UIViewAnimationOptionAutoreverse option. The problem is the image animation is a little bit jaggy (twitching) at the end of the animation. Here's my code: [UIView animateWithDuration:0.25 delay:0 options:UIViewAnimationOptionAutoreverse animations:^{ myImage.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);} completion:^(BOOL finished){if (finished){ myImage.transform =

问题 In my iPhone application I have to show a UIImage with its all four corners curved so that it looks good on the screen. But my image is a rectangular image which cannot be altered at image level as it comes from a third party. With UIImageView I can set the frame. Using code, how can I modify my UIImage to have rounded corners? Any clue? 回答1: try this way: UIImageView *imageView = ...; imageView.layer.cornerRadius = 7; // change this value as per your desire imageView.clipsToBounds = YES; 来源：

问题 I am having trouble accomplishing something that I thought was going to be much easier. I am trying to run a method whenever a non transparent part of a picture inside a UIImage touches another non-transparent part of an image contained within a UIImage. I have included an example to help further explain my question. As you can see in the image above, I have two triangles that are both inside a UIImage. The triangles are both PNG pictures. Only the triangle is visible because the background

问题 Right Now I have two image views. All the button does is save the photo with the red box over the blue box and it will save image2 in the blue box and image1 in the red box. I would like red box to be saved over the blue box in just the small bottom right section of the blue box. Just like a lower third you see on tv ]] import UIKit class ViewController: UIViewController { var image1 = UIImage(named: "f.jpg") var image2 = UIImage(named: "l.jpg") override func viewDidLoad() { super.viewDidLoad