将objective-c方法转换为swift [updateSearchResultsForSearchController]

Question

我试图将以下Objective-C方法转换为Swift，但我遇到了一些问题。

我在使用谓词时遇到了麻烦，因为它在下面描述了Swift语法。

有人可以给我一个提示吗？

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController { 

// filter the search results 
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains [cd] %@", self.controller.searchBar.text]; 
self.results = [self.data filteredArrayUsingPredicate:predicate]; 

// NSLog(@"Search Results are: %@", [self.results description]); 

}

问候，IC

Answer 1

let predicate = NSPredicate(format: "SELF contains[cd] %@", self.controller.searchBar.text!) 
results = data.filter({ item in 
    predicate.evaluateWithObject(item) 
}) 

或者一个更简洁的解决方案：

let predicate = NSPredicate(format: "SELF contains[cd] %@", self.controller.searchBar.text!) 
results = data.filter { predicate.evaluateWithObject($0) } 

Answer 2

试试这个：

func updateSearchResultsForSearchController(searchController: UISearchController) { 
    let predicate = NSPredicate(format: "SELF contains [cd] %@", argumentArray: [self.controller.searchBar.text]) 
    self.results = (self.data as NSArray).filteredArrayUsingPredicate(predicate) 
}