Filter array using custom object property [closed]

问题

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Closed 5 years ago.

I have an array of objects.Each object has its own properties (name, desc, status). name and desc are NSString and status is BOOL.

I want to filter this array by status property. Ex: Get all objects with status == YES.

How can I achieve this?

回答1:

Try use NSPredictate

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status = %@", @"YES"];
NSArray *filterArray = [array filteredArrayUsingPredicate:predicate];

This gives you an array with all object where status is equal YES.

回答2:

Try this,

NSPredicate *predicate =[NSPredicate predicateWithFormat:@"status = YES"];
NSArray *filteredArray = [yourArray filteredArrayUsingPredicate:predicate];

回答3:

Hi you can try this one,

NSMutableArray *array =[NSMutableArray arrayWithObjects:@"Apple", @"Animal", @"baby", @"ball", nil];

NSPredicate *aPredicate =
    [NSPredicate predicateWithFormat:@"SELF beginswith[a] 'b'"];
NSArray *beginWithA =
    [array filteredArrayUsingPredicate:aPredicate];

The beginWithA array will have { @"Apple", @"Animal" }.

NSPredicate *bPredicate =
    [NSPredicate predicateWithFormat:@"SELF contains[b] 's'"];
[array filterUsingPredicate:bPredicate];
The array will have { @"baby", @"ball" }

Thanks

来源：https://stackoverflow.com/questions/21572509/filter-array-using-custom-object-property