uiimagepickercontroller

问题 Is there a built in function in objective-c to do image cropping like the one in iOS photo gallery? I have tried enabling editing in UIImagePickerController, but it doesn't do the same. Thanks! 回答1: there are quite a few ways to crop images using the Core Graphics functions, the most basic one would be: CGRect cropRect = CGRectMake(0, 0, 100, 100); CGImageRef cropped_img = CGImageCreateWithImageInRect(yourUIImage.CGImage, cropRect) 回答2: This is no built in function. The way to do it would be

问题 I am very new to IOS Swift. But I am building a sample camera app that takes picture and video and then saved to photo gallery. But I want user to choose Auto/On/Off Flash option on the Camera View and when the user takes the picture then flash turns on or turns off depending on option what he/she chooses. I am using UIImagePickerController to customize camera features. I couldn't get much suggestions so far on how can I able to On/Off feature on the camera view and the camera flash works

问题 This question is very similar to an existing question asked here UIImagePickerControllerCameraDeviceFront only works every other time I tried the solution presented but it didn't work for me I have a simplest of a project with two view controllers. In the blue one I am displaying a small UIView with a UIImagePickerController in it. NOTE: I am displaying front facing camera when app is launched. I hit the next button and go to orange view controller and when I hit the back button and come back

问题 my question is simple: how can i change change title of bar button in UIImagePickerController's navigation bar? I created the controller for UIImagePickerController (triggered by the pressure onto a button) and then tried to modify its properties: - (IBAction)chooseFromRoll:(id)sender { if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeSavedPhotosAlbum]){ UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.navigationBar

问题 I have a UIViewController, that I would like upon loading the view - to open a UIImagePickerController for the camera. A. I wrote the following: EDITED - I am using now viewDidAppear - (void)viewDidAppear:(BOOL)animated{ imagePicker = [[UIImagePickerController alloc] init]; if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){ [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera]; } else{ [imagePicker setSourceType

问题 Ok here is the code that I wrote to display the UIImagePickerController in the camera source. I just declared the myPhotopicker in the header for the property and retain it. Synthesized it in the main code file. Then calling the picker I wrote the code below: if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { if (myPhotopicker==nil) { myPhotopicker = [[UIImagePickerController alloc] init]; myPhotopicker.delegate = self; }// create once!

问题 I have a UITableView and a UITableViewCell. In every UITableViewCell I want to open gallery or click an image. I normally present UIImageviewController like - (IBAction)takePhoto:(UIButton *)sender { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.allowsEditing = YES; picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentViewController:picker animated:YES completion:NULL]; } How can I present from cell ? Misha :) 回答1

问题 I am trying to show a UIImagePickerController in a UIViewController inside a UITabBarController SourceType Camera MediaType kUTTypeMovie There's no issue presenting the UIImagePickerController, but when dismissed the TabBar moves down half the height, it only happens sometimes... other it dismisses perfectly. override func viewDidLoad() { var test: UIButton = UIButton(frame:CGRectMake(140, 200, 100, 100)) test.backgroundColor = UIColor.redColor() test.addTarget(self, action:"presentCamera",

问题 This is camera overlay for my app, The yellow square is to indicate user that only photo inside this part (in camera) will be saved. It's like crop. When I saved that capture image, it'll save zoomed photo [a big zoomed on photo], What I found is, when I took a photo, it'll be of size of {2448, 3264} I'm cropping the image like this, - (UIImage *)imageByCroppingImage:(UIImage *)image toSize:(CGSize)size { double x = (image.size.width - size.width) / 2.0; double y = (image.size.height - size

问题 could you please help me with UIImagePickerController I have 12 ImageViews in 1 ViewController. I need help so that each ImageView could pick different photos from Library. Someone told me to use Tags for them but I can't make it work cause i'm new in Swift. 回答1: Enable User Interaction Enabled for each UIImageView on a Storyboard. Add TapGestureRecogniser to each UIImageView . Connect each TapGestureRecogniser with IBAction . @IBAction func tap(_ sender: UITapGestureRecognizer) {