小编Des*_*ner的帖子

我正在尝试为UISearchbar自定义文本字段.下图显示了我完成的一半工作.

我有UISearchbar的子类,并从我的视图控制器调用它.我正试图从文本字段中删除那些深灰色线条.下面是添加到viewcontroller子视图的UISearchbar的实现.

searchbar = [[SearchBar alloc] initWithFrame:CGRectMake(35,78, 250, 17)];
searchbar.backgroundColor = [UIColor clearColor];
searchbar.layer.borderColor = [[UIColor clearColor] CGColor];
searchbar.layer.borderWidth = 0;

for(UIView *view in searchbar.subviews){
    if([view isKindOfClass:[UITextField class]]){
        UITextField *tf= (UITextField *)view;
        tf.layer.borderColor = [[UIColor clearColor] CGColor];
        tf.delegate = self;
        break;
    }
}
[self.view addSubview:searchbar];
searchbar.delegate = self;

UISearchBar子类:

   - (id)initWithFrame:(CGRect)frame
  {
   self = [super initWithFrame:frame];
if (self) {
      // Initialization code
     }
     return self;
}

-(void)layoutSubviews{
     UITextField *searchField;
     [[[self subviews] objectAtIndex:0] removeFromSuperview];
     [self setTintColor:[UIColor clearColor]];
     self.clipsToBounds = YES;
     NSUInteger …

我正在使用pickerController的视图和uinavigationcontrollerdelegate添加叠加层,如下所示.

-(void)navigationController:(UINavigationController *)navigationController didShowViewController:  (UIViewController *)viewController animated:(BOOL)animated{
    if ([navigationController.viewControllers count] == 3)
     {
       CGFloat screenHeight = [[UIScreen mainScreen] bounds].size.height;

       UIView *plCropOverlay = [[[viewController.view.subviews objectAtIndex:1]subviews] objectAtIndex:0];

       plCropOverlay.hidden = YES;

       int position = 0;

       if (screenHeight == 568)
       {
           position = 124;
       }
       else
       {
          position = 80;
      }

      CAShapeLayer *circleLayer = [CAShapeLayer layer];

      UIBezierPath *path2 = [UIBezierPath bezierPathWithOvalInRect:
                           CGRectMake(0.0f, position, 320.0f, 320.0f)];
      [path2 setUsesEvenOddFillRule:YES];

      [circleLayer setPath:[path2 CGPath]];

      [circleLayer setFillColor:[[UIColor clearColor] CGColor]];
      UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 320, screenHeight-72) cornerRadius:0];

      [path …

给定两个输入 i。原始图像 & ii. 蒙版图像，从原始图像中删除背景的最佳方法是什么。

原始图像

遮罩图像

最终的输出将只包含没有背景的狗并且看起来是透明的。我看到掩模图像也是用 OpenCV 创建的。有没有办法只使用现有的掩模图像并生成输出图像？

更新 我尝试过这个

import cv2

# opencv loads the image in BGR, convert it to RGB
img = cv2.imread("originalImage.png")
mask = cv2.imread("maskImage.png")
final = cv2.bitwise_and(img, mask)
cv2.imwrite("final.png", final)

最终图像

有没有办法把背景设置成透明？

我有一个标题标签，定义如下：

private lazy var titleLabel: UILabel = {
 let label = UILabel()
 label.numberOfLines = 2
 label.setContentCompressionResistancePriority(.init(rawValue: 999), for: .vertical)
 return label
}()

private lazy var descriptionLabel: UILabel = {
  let label = UILabel()
  label.numberOfLines = 0
  label.lineBreakMode = .byTruncatingTail
  return label
}()

titleLabel可以增长并强制收缩descriptionLabel。单元格高度固定为120或78。当单元格高度为78时，高度descriptionLabel为0

两者都添加到UIStackview

private lazy var labelStackView: UIStackView = {
  let stackView = UIStackView()
  stackView.addArrangedSubview(titleLabel)
  stackView.addArrangedSubview(descriptionLabel)
  stackView.axis = .vertical
  stackView.distribution = .fill
  return stackView
}()

stackView 添加containerView到顶部、左侧、右侧和底部的填充内部。固定containerView在 的边缘 …

我有一个类似下面给出的目录结构.

         MainFolder 
             |
           [lib] 
         /   |   \
       [A]  [B]  [C] -- file1.so 
        |     |         file2.so
   file1.so   file1.so
   file2.so   file2.so    

我正在尝试在该结构中寻找可能不存在的'lib'文件夹.所以我使用以下内容来检查'lib'文件夹是否存在:

   if os.path.isdir(apkLocation + apkFolder + '/lib/'):

如果存在lib文件夹,那么我继续搜索'lib'中的文件夹.我必须存储文件夹A,B和C的名称,并查找以".so"结尾的文件,其路径应存储为/lib/A/file1.so,/lib/A/file2.so等等上.

 if os.path.isdir(apkLocation + apkFolder + '/lib/'):
   for root, dirs, files in os.walk(apkLocation + apkFolder):
            for name in files:
                if name.endswith(("lib", ".so")):
                    print os.path.abspath(name) 

这让我出局了

                  file1.so
                  file2.so
                  file1.so
                  file2.so
                  file1.so
                  file2.so

期望的输出:

           /lib/A/file1.so
           /lib/A/file2.so
           /lib/B/file1.so
           /lib/B/file2.so
           /lib/C/file1.so
           /lib/C/file2.so

文件夹A,B和C也要单独保存.

我有一个表格的MySQL表格:

    id | error 1 | error 2 | error 3 | error 4 |
    --------------------------------------------
     1 |    1    |    0    |    0    |    1    |
    -------------------------------------------
     2 |    0    |    0    |    0    |    0    |

id是主键,错误是布尔列.有没有办法我可以获取行的ID,如果任何错误是1为真,如果所有错误都为零,则为false.