更改UITableView删除图像开关 [英] Change UITableView delete image swit
问题描述
我需要更改UITableView单元格的-按钮颜色并删除按钮(按下-按钮后显示)。我已经尝试过此答案 uitableview在iOS中删除按钮图片,但没有在UITableView编辑模式下工作。
请帮忙。
我们可以进一步执行此操作:
1。)首先,添加UIView扩展
扩展UIView {
func image() -> UIImage {
UIGraphicsBeginImageContextWithOptions(bounds.size,isOpaque,0)
保护let context = UIGraphicsGetCurrentContext()否则{
return UIImage()
}
layer.render( in:context)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
返回图片!
}
}
2.)第二个方法是在UITableView的下面添加以下委托方法。 -> UITableViewCellEditingStyle {
return .delete
}
覆盖func tableView(_ tableView:UITableView,editActionsForRowAt indexPath:IndexPath)-> [UITableViewRowAction]? {
let kCellActionWidth = CGFloat(70.0)//您想要删除按钮的宽度
let kCellHeight = tableView.frame.size.height //您想要删除按钮的高度
让空白= whitespaceString(width:kCellActionWidth)//添加填充
let deleteAction = UITableViewRowAction(style:.`default`,title:whitespace){_,_ in
/ /做任何你想做的动作
}
//从模式图像创建一种颜色,并将该颜色设置为动作的背景色
let view = UIView(frame:CGRect (x:tableView.frame.size.width-70,y:0,宽度:70,高度:kCellHeight))
view.backgroundColor = UIColor(红色:219.0 / 255.0,绿色:71.0 / 255.0,蓝色: 95.0 / 255.0,alpha:1.0)//视图
的背景色let imageView = UIImageView(frame:CGRect(x:15,
y:20,
width:40,
高度:40))
imageView.image = UIImage(named: xyz)! //所需的图片
view.addSubview(imageView)
let image = view.image()
deleteAction.backgroundColor = UIColor.init(patternImage:image)
return [deleteAction]
}
fileprivate func whitespaceString(font:UIFont = UIFont.systemFont(ofSize:15),width:CGFloat)->字符串{
let kPadding:CGFloat = 20
let mutable = NSMutableString(string:)
let attribute = [NSFontAttributeName:font]
而mutable.size(attributes:attribute ).width<宽度-(2 * kPadding){
mutable.append()
}
返回可变的字符串
}
I need to change UITableView Cell's "-" button color and delete button(which is showing after "-" button pressed) image. I have tried this answer uitableview delete button image in iOS but it doesn't work in UITableView edit mode. Please, help.
We can do this in further steps:
1.) First, add a UIView extension
extension UIView {
func image() -> UIImage {
UIGraphicsBeginImageContextWithOptions(bounds.size, isOpaque, 0)
guard let context = UIGraphicsGetCurrentContext() else {
return UIImage()
}
layer.render(in: context)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image!
}
}
2.) second add these below delegates method of UITableView.
override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle {
return .delete
}
override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
let kCellActionWidth = CGFloat(70.0)// The width you want of delete button
let kCellHeight = tableView.frame.size.height // The height you want of delete button
let whitespace = whitespaceString(width: kCellActionWidth) // add the padding
let deleteAction = UITableViewRowAction(style: .`default`, title: whitespace) {_,_ in
// do whatever the action you want
}
// create a color from patter image and set the color as a background color of action
let view = UIView(frame: CGRect(x: tableView.frame.size.width-70, y: 0, width: 70, height: kCellHeight))
view.backgroundColor = UIColor(red: 219.0/255.0, green: 71.0/255.0, blue: 95.0/255.0, alpha: 1.0) // background color of view
let imageView = UIImageView(frame: CGRect(x: 15,
y: 20,
width: 40,
height: 40))
imageView.image = UIImage(named: "xyz")! // required image
view.addSubview(imageView)
let image = view.image()
deleteAction.backgroundColor = UIColor.init(patternImage: image)
return [deleteAction]
}
fileprivate func whitespaceString(font: UIFont = UIFont.systemFont(ofSize: 15), width: CGFloat) -> String {
let kPadding: CGFloat = 20
let mutable = NSMutableString(string: "")
let attribute = [NSFontAttributeName: font]
while mutable.size(attributes: attribute).width < width - (2 * kPadding) {
mutable.append(" ")
}
return mutable as String
}
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