ViewStyle provides a CSS-like way to set the style of a view in iOS.
The general structure of the Web front-end is that HTML is used to organize the basic structure of the view, and CSS is used to set the display style of HTML. In iOS, if you draw the UI with pure code but not Interface Builder, you need to set the view style manually. Just like HTML and CSS, the aim of ViewStyle is to separate the view structure and style code.
Generally, we will set up a UITableView as follow:
tableView = UITableView(frame: self.view.bounds)
tableView!.dataSource = self
tableView!.delegate = self
tableView!.register(UITableViewCell.self, forCellReuseIdentifier: "TableViewCell")
tableView!.rowHeight = 60.0
tableView!.separatorStyle = UITableViewCellSeparatorStyle.singleLine
tableView!.separatorColor = UIColor.lightGray
tableView!.backgroundView = UIView()
tableView!.separatorInset = UIEdgeInsets(top: 10.0, left: 5.0, bottom: 3.0, right: 10.0)
tableView!.cellLayoutMarginsFollowReadableWidth = true
self.view.addSubview(tableView!)It is a little bit complicated, especially when there are a lot the views to set. In this case, we might consider to separate the code for the style settings. ViewStyle provides a mi_styles property for the UIView to set some basic style, just like the following way:
class ViewController: UIViewController {
var tableView: UITableView?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
// ...
tableView = UITableView(frame: self.view.bounds)
tableView!.dataSource = self
tableView!.delegate = self
tableView!.register(UITableViewCell.self, forCellReuseIdentifier: "TableViewCell")
tableView!.mi_styles = self.tableViewStyle
self.view.addSubview(tableView!)
}
}
// MARK: - Table View Style
extension ViewController {
var tableViewStyle: [Property: Any] {
return [
.rowHeight: 60.0,
.separatorStyle: UITableViewCellSeparatorStyle.singleLine,
.separatorColor: UIColor.lightGray,
.backgroundView: UIView(),
.separatorInset: UIEdgeInsets(top: 10.0, left: 5.0, bottom: 3.0, right: 10.0),
.cellLayoutMarginsFollowReadableWidth: true
]
}
}There are two ways to define a style:
- Computing properties of the class
- Global constants
It is according to the actual situations.
Note: If you set multiple
mi_stylesfor the same view, and the style has the same property, then the settings will override the previous settings.
There are some obvious problems in ViewStyle:
- It is not used for layout;
- Add
pod 'ViewStyle'to your Podfile; - Run
pod installorpod update; import ViewStyle)
This library requires iOS 8.0+.
ViewStyle is provided under the MIT license. See LICENSE file for details.