我如何在 IOS 中将文本框覆盖在本机相机视图上

Question

在执行我正在尝试完成的构建时遇到问题。

我已完成构建 1 和构建 2。

构建 1 - 一个简单的空白屏幕，其中包含两个具有对齐约束的文本框

Build 2 - 当应用程序为 运行 时，它会调用 IOS 设备的原生后置摄像头。

我的第三个构建是将这两个之前的构建合二为一，其中本机摄像头显示实时视频源，上面是两个具有对齐约束的文本框。

我不确定如何将这两段代码放在一起。

我目前拥有的代码：

Build 1 - .h 文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) IBOutlet UIView *TestTextBox;

@property (weak, nonatomic) IBOutlet UITextView *TestTetBox2;

@end

构建 1 - .m 文件

#import "ViewController.h"

@interface ViewController ()

@end



@implementation ViewController

@synthesize TestTextBox;

@synthesize TestTetBox2;


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

构建 2 - .h 文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIImagePickerControllerDelegate,UINavigationControllerDelegate>

@property (strong, nonatomic) IBOutlet UIImageView *imageView;


@end

Build 2 - .m 文件

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];

    if (self.imageView.image == nil) {
        UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
        imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
        imagePickerController.delegate = self;
        imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; //Defualts to Native Camera View
        imagePickerController.showsCameraControls = NO; //removes camera controlls
        [self presentViewController:imagePickerController animated:NO completion:nil];
    }

    else{

    }

}

-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
    self.imageView.image = image;
    [self dismissViewControllerAnimated:YES completion:nil];
}



- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

Answer 1

您不能使用 UIImagePickerController 在自定义 UIView 中展示相机。您需要使用 AVFoundation 框架在自定义 UIView.

中呈现相机