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我知道这是每天都可以问的那种，但事实是每个问题的答案都可能不同，我还没有找到。

我目前是 Objective C 的真正初学者，我正在使用该框架开发一个应用程序OpenCV。

我一直在关注这个网站进行学习，然后我遇到了问题。

我复制/粘贴了网站中提供的 3 种方法，将 cv::Mat 转换为 UIImage，将 UIImage 转换为 cv::Mat，但我不能使用它们：

我的 *.pch 文件：

#import <Availability.h>

#ifndef __IPHONE_5_0
#warning "This project uses features only available in iOS SDK 5.0 and later."
#endif

#ifdef __cplusplus
#import <opencv2/opencv.hpp>
#endif

#ifdef __OBJC__
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#endif

我的 ViewController.hh 文件

#import <UIKit/UIKit.h>
@interface ViewController : UIViewController

- (cv::Mat)cvMatFromUIImage:(UIImage *)image;
- (cv::Mat)cvMatGrayFromUIImage:(UIImage *)image;
- (UIImage *)UIImageFromCVMat:(cv::Mat)cvMat;
@end

和我的 ViewController.mm 文件

#import "ViewController.hh"

@interface ViewController ()

@end


@implementation ViewController

- (cv::Mat)cvMatFromUIImage:(UIImage *)image
{
    @@@//what is given in the linked website
    return cvMat;
}

- (cv::Mat)cvMatGrayFromUIImage:(UIImage *)image
{
    @@@//what is given in the linked website
    return cvMat;
}

-(UIImage *)UIImageFromCVMat:(cv::Mat)cvMat
{
    @@@//what is given in the linked website    
    return finalImage;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSString* filename = [[NSBundle mainBundle] pathForResource:@"openCV" ofType:@"jpg"];
    UIImage *image = [UIImage imageWithContentsOfFile:filename];

    cv::Mat inputMat = cvMatFromUIImage(image);
    UIImage *newImage = UIImageFromCVMat(inputMat);

    self.view.backgroundColor = [UIColor colorWithPatternImage:newImage];
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"HelloWorld !" message:@"Welcome to OpenCV !" delegate:self cancelButtonTitle:@"Continue" otherButtonTitles:nil, nil];
    [alert show];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

(void) viewDidLoad2个错误在文件中单独的行上.mm，它表示两者cvMatFromUIImage都UIImageFromCVMat没有声明。

It might be a stupid question, I guess that I missed something, but don't know what.

Please help me :)

4

1 回答 1

2

I think you've defined your functions in Objective-C but are using the C standard for calling them... Change these:

cvMatFromUIImage(image)
UIImageFromCVMat(inputMat)

to

[self cvMatFromUIImage:image];
[self UIImageFromCVMat:inputMat];
于 2013-02-25T13:42:24.207 回答