小编aat*_*lyk的帖子

我正在开发一个应用程序，我使用 OpenCV 的 matchShapes() 比较两个图像。

我在Objective-C代码中实现的方法如下

- (void) someMethod:(UIImage *)image :(UIImage *)temp {

RNG rng(12345);

cv::Mat src_base, hsv_base;
cv::Mat src_test1, hsv_test1;

src_base = [self cvMatWithImage:image];
src_test1 = [self cvMatWithImage:temp];

int thresh=150;
double ans=0, result=0;

Mat imageresult1, imageresult2;

cv::cvtColor(src_base, hsv_base, cv::COLOR_BGR2HSV);
cv::cvtColor(src_test1, hsv_test1, cv::COLOR_BGR2HSV);

std::vector<std::vector<cv::Point>>contours1, contours2;
std::vector<Vec4i>hierarchy1, hierarchy2;

Canny(hsv_base, imageresult1, thresh, thresh*2);
Canny(hsv_test1, imageresult2, thresh, thresh*2);

findContours(imageresult1,contours1,hierarchy1,CV_RETR_TREE,CV_CHAIN_APPROX_SIMPLE,cvPoint(0,0));
for(int i=0;i<contours1.size();i++)
{
    Scalar color=Scalar(rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255));
    drawContours(imageresult1,contours1,i,color,1,8,hierarchy1,0,cv::Point());
}

findContours(imageresult2,contours2,hierarchy2,CV_RETR_TREE,CV_CHAIN_APPROX_SIMPLE,cvPoint(0,0));
for(int i=0;i<contours2.size();i++)
{
    Scalar color=Scalar(rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255));
    drawContours(imageresult2,contours2,i,color,1,8,hierarchy2,0,cv::Point());
}

for(int i=0;i<contours1.size();i++)
{ …

我想实现TapGestureRecognizer与selector,下面是我添加tapGestureRecognizer到我的代码imageView

let tapFirstGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(assignImage(_:)))
firstImageView.isUserInteractionEnabled = true
firstImageView.tag = 1
firstImageView.addGestureRecognizer(tapFirstGestureRecognizer)

这是动作方法

func assignImage(_ sender: UIImageView){
    imagePicker.allowsEditing = false
    imagePicker.sourceType = .photoLibrary
    imageViewTag = sender.tag

    present(imagePicker, animated: true, completion: nil)
}

编译器一直在说

[UITapGestureRecognizer标签]:无法识别的选择器发送到实例0x6080001a7700'