在tableView中使用按钮/图像:编辑操作错误:

简单的逻辑。。!!手动我们不给xshift和xshift Inc。

案例1:

let downBtn = UITableViewRowAction(style: .normal, title: "") {
        action, index in
        print("downBtn touched!")
}

此处标题的文本为“”[无空格的空字符串]

因此,tableview会自动为每个视图获取30px的宽度。如果我们添加文本,它将自动增加其宽度大小。

案例2:

let downBtn = UITableViewRowAction(style: .normal, title: " ") {
        action, index in
        print("downBtn touched!")
}

此处标题的文本为“”[带1个空格的空字符串]

因此,tableview自动将宽度设为35px。

希望你能理解以上的事情。

现在,我修改了你的代码。

 func tableView(_ tableView: UITableView,
               editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {


    let cell = tableView.cellForRow(at: indexPath) as!      myTableViewCell

    print("cell_height    ", cell.frame.size.height) // U MAY GET ROW HEIGHT HERE

    var patternImg:UIImage?

    let downBtn = UITableViewRowAction(style: .normal, title: "  ") {
        action, index in
        print("downBtn touched!")
    }
    patternImg = swipeCellImage(named: "down", rowHeight: cell.frame.size.height)
    downBtn.backgroundColor = UIColor(patternImage: patternImg!)

    let upBtn = UITableViewRowAction(style: .normal, title: "  ") {
        action, index in
        print("upBtn touched!")
    }

    patternImg = self.swipeCellImage(named: "up", rowHeight: cell.frame.size.height)
    upBtn.backgroundColor = UIColor(patternImage: patternImg!)

    let rmvBtn = UITableViewRowAction(style: .destructive, title: "  ") {
        action, index in
        print("rmvBtn touched!")
    }

    let patternIm = swipeCellImage(named: "trash", rowHeight: cell.frame.size.height)

    rmvBtn.backgroundColor = UIColor(patternImage: patternIm!)


    return [downBtn,upBtn,rmvBtn]
}


func swipeCellImage(name: String, rowHeight: CGFloat) -> UIImage? {

    let imgYposition : CGFloat = (rowHeight - 30) / 2

    // NOTE: This 30px is image height. Image height is always should be less than Rowheight.

    let theImage = UIImage(named: name)
    UIGraphicsBeginImageContextWithOptions(CGSize(width: UIScreen.main.bounds.width,
                                                  height: rowHeight), false, UIScreen.main.scale)
    let context = UIGraphicsGetCurrentContext()
    context!.setFillColor(UIColor.yellow.cgColor)
    context!.fill(CGRect(x: 0, y: 0, width: (self.view.frame.width) / 3, height: side))

    theImage?.draw(in: CGRect(x: 5, y: imgYposition, width: 30, height: 30))

    // In this sample, am taking rowHeight as 44px.
    // Images should be 30 * 30 sizes.
    // I gave two spaces in title. So total width is 40px.
    // So,x = 5px and y = 7px.

    let resultImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext()
    return resultImage
}

输出

如果您想在三个按钮之间留出更多的间距,只需增加标题的空文本,计算宽度并保持图像中心。