Refresh tableView appearance - ios

Question

I want to refresh tableView appearance after I press "Dark mode".But it looks like this:
Before press"Dark mode"
After press"Dark mode"
How can I refresh this tableView after I changed it's appearance
Mycode:
#IBAction func setDarkMode(sender: UISwitch) {
UIView.animateWithDuration(0.5, delay:0,options:UIViewAnimationOptions.BeginFromCurrentState, animations: { () -> Void in
self.setStyleMode()
}) { (finish: Bool) -> Void in
}
}
func setStyleMode() {
if isDarkMode {
view.backgroundColor = UIColor(red:0.1922, green:0.1922, blue:0.1922, alpha:1.0)
self.tableView.backgroundView?.backgroundColor = UIColor(red:0.1922, green:0.1922, blue:0.1922, alpha:1.0)
tableView.separatorColor = UIColor(red:0.3137, green:0.3137, blue:0.3137, alpha:1.0)
self.navigationController?.navigationBar.barTintColor = UIColor(red:0.1451, green:0.1451, blue:0.1451, alpha:1.0)
self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor(red:0.6549, green:0.6549, blue:0.6549, alpha:1.0)]
self.navigationController?.navigationBar.tintColor = UIColor(red:0.9412, green:0.3412, blue:0.302, alpha:1.0)
for sectionIndex in 0...tableView.numberOfSections - 1 {
for rowIndex in 0...tableView.numberOfRowsInSection(sectionIndex) - 1 {
let cellPath = NSIndexPath(forRow: rowIndex, inSection: sectionIndex)
let cell = tableView.cellForRowAtIndexPath(cellPath)
cell?.backgroundColor = UIColor(red:0.1451, green:0.1451, blue:0.1451, alpha:1.0)
}
}
for aLabel in labels {
aLabel.textColor = UIColor(red:0.6549, green:0.6549, blue:0.6549, alpha:1.0)
}
} else {
view.backgroundColor = UIColor.whiteColor()
tableView.backgroundColor = UIColor(red:0.9529, green:0.9529, blue:0.9529, alpha:1.0)
tableView.separatorColor = UIColor(red:0.7372, green:0.7371, blue:0.7372, alpha:1.0)
self.navigationController?.navigationBar.barTintColor = UIColor.whiteColor()
self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.blackColor()]
self.navigationController?.navigationBar.tintColor = UIColor(red:0.9412, green:0.3412, blue:0.302, alpha:1.0)
for sectionIndex in 0...tableView.numberOfSections - 1 {
for rowIndex in 0...tableView.numberOfRowsInSection(sectionIndex) - 1 {
let cellPath = NSIndexPath(forRow: rowIndex, inSection: sectionIndex)
let cell = tableView.cellForRowAtIndexPath(cellPath)
cell?.backgroundColor = UIColor.whiteColor()
//do stuff with 'cell'
}
}
for aLabel in labels {
aLabel.textColor = UIColor.blackColor()
}
}
}
(This "settings" tableView is in a "tableviewController " and embed in a ContainerView)

Answer 1

Looks like you have not called reloadData()
Once your style changes are over call call execute the following code
tableView.reloadData()
Another thing is, styling your tableViewCellshould be done inside
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
Not inside setStyleMode() function. You can make the style changes based on some bool value.
Hope this will resolve your issue

Answer 2

You're setting the cell's background color, but not the cell's contentView's background color.
You should do:
let cell = tableView.cellForRowAtIndexPath(cellPath)
cell?.backgroundColor = ....
cell?.contentView.backgroundColor = ....
You might have to dig deeper if your cell has more wrapper views in the hierarchy.
A couple of observations, though:
It would be a better pattern to define a method within the UITableViewCell subclass to define a dark and light mode. In complex cell structures, you might not easily be able to access all the subviews you need. Besides, what about encapsulation?
I would also much prefer the reload way. Calling a UITableViewDatasource method manually seems like an anti-pattern.
There's a lot of duplication in your code. You could significantly reduce the dependency by, for instance, using ternary operators on isDarkMode

Answer 3

Need change background of "headerView" and "footerView" in "setStyleMode()"
let header = tableView.headerViewForSection(sectionIndex)
let footer = tableView.footerViewForSection(sectionIndex)
header?.contentView.backgroundColor = UIColor(red:0.1922, green:0.1922, blue:0.1922, alpha:1.0)
footer?.contentView.backgroundColor = UIColor(red:0.1922, green:0.1922, blue:0.1922, alpha:1.0)