在横向使用UIImagePickerController

Question

我正在创建一个横向模式的应用程序,我正在UIImagePickerController使用iPhone相机拍摄照片,我也希望以横向模式创建它.

但是,正如Apple文档所暗示的UIImagePickerController那样,不支持横向定位,那么我该如何才能获得所需的功能呢？

Answer 1

如果您想在横向模式下使用UIImagePickerController,请使用user1673099的答案,而不是:

- (BOOL)shouldAutorotate
{
    return NO;
}

使用:

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskLandscape;
}

然后选择器将以横向模式打开:

但请确保在部署信息中检查Portrait:

Answer 2

......我想在横向模式下创建它.

一行代码可以产生很大的不同!在您的IBAction登陆的方法或功能中:

在斯威夫特,

let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
// .overCurrentContext allows for landscape and portrait mode
imagePickerController.modalPresentationStyle = .overCurrentContext

Objective-C中,

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
[imagePickerController setDelegate:self];
[imagePickerController setModalPresentationStyle: UIModalPresentationOverCurrentContext];

注意:这将允许imagePickerController提出它的观点正确,但将 可同时呈现不解决旋转的问题.

Answer 3

试试这个......

根据Apple Document,ImagePicker Controller从不在横向模式下旋转.您只能在纵向模式下使用.

仅对于ImagePicker控制器禁用横向模式,请遵循以下代码:

在您的ViewController.m中:

制作Image Picker Controller的SubClass(NonRotatingUIImagePickerController)

@interface NonRotatingUIImagePickerController : UIImagePickerController

@end

@implementation NonRotatingUIImagePickerController
// Disable Landscape mode.
- (BOOL)shouldAutorotate
{
    return NO;
}
@end

使用方法如下

UIImagePickerController* picker = [[NonRotatingUIImagePickerController alloc] init];
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        picker.delegate = self; 
  etc.... Just as Default ImagePicker Controller

这对我有用,如果您有任何问题,请告诉我.

Answer 4

这适用于iOS 10/11中的Swift 4.0.

import UIKit

extension UIImagePickerController {
    override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .all
    }
}

只需将扩展名放在项目的某个位置,就不需要为了它的工作而继承子类.

如果确实需要指定设备类型,可以添加如下检查:

import UIKit

extension UIImagePickerController {
    override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return UIDevice.current.userInterfaceIdiom == .phone ? .portrait : .all
    }
}

这将允许iPad自由旋转,但在手机上强制执行纵向模式.只需确保您的应用程序配置为在其info.plist中支持这些,否则您可能会在启动选择器时遇到崩溃.

Answer 5

这是一个支持所有界面方向旋转的版本:

/// Not fully supported by Apple, but works as of iOS 11.
class RotatableUIImagePickerController: UIImagePickerController {

  override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return .all
  }
}

这样,如果用户旋转她的设备,它将更新选择器控制器以支持当前方向.像往常一样实例化UIImagePickerController.

如果您只想支持方向子集,则可以返回不同的值.

Answer 6

UIImagePickerController在没有任何黑客攻击的横向模式中使用的正确方法是将其放入UIPopoverController

- (void)showPicker:(id)sender
{
    UIButton *button = (UIButton *)sender;
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    _popover = [[UIPopoverController alloc] initWithContentViewController:picker];
    [_popover presentPopoverFromRect:button.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}