Filter array in ios checking multiple properties

问题:

I have an array of custom objects. The custom object look like this

@interface User : NSObject @property(nonatomic, strong)NSString *user_Id; @property(nonatomic, strong)NSString *user_Name; @property(nonatomic, strong)NSString *user_UserName; @end 

I have to filter the array checking 2 properties.That is if I search a then it should get list of users filtered from array contains a in user_Name or user_Id .How can i achieve this? For a single property i know[user_Name]

NSString *predicateString = @"user_Name MATCHES[c] %@"; NSString *matchString =  [NSString stringWithFormat: @".*%@.*",searchText]; NSPredicate *predicate =[NSPredicate predicateWithFormat:predicateString, matchString]; self.searchResults = [userArray filteredArrayUsingPredicate:predicate]; 

回答1:

You can join predicate conditions with OR, such as:

NSString *predicateString = @"(user_Name MATCHES[c] %@) OR (user_Id MATCHES[c] %@)"; 

Alternately, you could filter the array by using indexesOfObjectsPassingTest: with an appropriate test block and then objectsAtIndexes: to get an array of the objects passing the test.

回答2:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(user_Name== %@) || (user_Id== %@), <name>,  <id>]; 

回答3:

Try to use this predicate string

NSString *predicateString = @"user_Name MATCHES[c] %@ OR user_Id MATCHES[c] %@"; 

文章来源: Filter array in ios checking multiple properties