Swift 3 filterWithPredicate not working - ios

Question

Unable to filter array of dictionaries using predicate here is my code and i would like to filter array of dictionaries having key "category"
let searchText = searchTF.text?.replacingOccurrences(of: " ", with: "")
if (searchText?.characters.count)!>0 {
let pred = NSPredicate(format: "SELF beginswith[c] %#", searchTF.text!)
let array = NSMutableArray()
array.insert(dataArray as [AnyObject], at:NSIndexSet(indexesIn: NSMakeRange(0, dataArray.count)) as IndexSet)
dataArray.removeAllObjects()
getedArray = NSMutableArray(array: array.filtered(using: pred))
dataArray = getedArray.sortedArray(using: #selector(localizedCaseInsensitiveCompare(_ :)))
}
its giving error at last line i.e
getedArray = NSMutableArray(array: array.filtered(using: pred))
NSArray).sortedArrayUsingSelector(#selector(self.localizedCaseInsensitiveCompare))
its giving error at last line Use of unresolved identifier 'localizedCaseInsensitiveCompare'

Answer 1

Try this Swift native solution. filteredArray will contain the filtered and sorted array.
guard let searchText = searchTF.text, !searchText.isEmpty else { return }
let trimmedSearchText = searchText.replacingOccurrences(of: " ", with: "").lowercased()
let filteredArray = dataArray.filter( {($0["category"] as! String).lowercased().hasPrefix(trimmedSearchText) })
.sorted { ($0["category"] as! String).lowercased() < ($1["category"] as! String).lowercased() }
The code assumes that there is always a value for key category. Consider to use a custom struct or class to avoid the casts to String.

Answer 2

I have Achieved this by
let searchText = searchTF.text?.replacingOccurrences(of: " ", with: "")
if (searchText?.characters.count)!>0 {
// Put your key in predicate that is "category"
let searchPredicate = NSPredicate(format: "category CONTAINS[C] %#", searchText!)
let array = (dataArray as NSMutableArray).filtered(using: searchPredicate)
print ("array = \(array)")
if(array.count == 0){
searchTFActive = false;
} else {
searchTFActive = true;
}
self.aTable.reloadData()
}