Ios NSPredicate用于NSDictionary键数组
我有 我想用谓词筛选我的字典。我应该如何构建它? 作为一种算法,我想应该是这样的:Ios NSPredicate用于NSDictionary键数组,ios,nsmutablearray,nsdictionary,nspredicate,Ios,Nsmutablearray,Nsdictionary,Nspredicate,我有 我想用谓词筛选我的字典。我应该如何构建它? 作为一种算法,我想应该是这样的: NSDictionary *myDictionary = @{ @"1":@"Egg Benedict", @"2":@"Mushroom Risotto", @"3":@"Full Breakfast", @"4":@"H
NSDictionary *myDictionary = @{ @"1":@"Egg Benedict",
@"2":@"Mushroom Risotto",
@"3":@"Full Breakfast",
@"4":@"Hamburger",
@"5":@"Ham and Egg Sandwich",
@"6":@"Cream Brelee"};
NSMutableArray *myKeys = [NSMutableArray arrayWithArray:[myDictionary allKeys]];
如何使用谓词字符串实现这一点?您将
myObjects
作为一个可变的键数组,因此可以过滤该数组。这些键只是字符串。其谓词应为:
[filteredKeys removeAllObjects];
for (NSString *a in myKeys) {
if ([[myDictionary objectForKey:a] rangeOfString:searchText].location != NSNotFound) {
[filteredKeys addObject:a];
}
}
过滤完数组后,可以使用以下工具获取更新的词典:
@"SELF contains[c] %@", searchText
NSDictionary *filtered = [myDictionary dictionaryWithValuesForKeys:myObjects];