NSPredicate的初步使用

NSPredicate的初步使用

view plain
一： 
NSArray *arrayFilter = [NSArray arrayWithObjects: @"pict", @"blackrain", @"ip", nil]; 
    NSArray *arrayContents = [NSArray arrayWithObjects: @"I am a picture.", @"I am a guy", @"I am gagaga", @"ipad", @"iphone", nil]; 
     
    //我想过滤arrayContents的话只要循环 arrayFilter就好了 
     
    int i = 0, count = [arrayFilter count]; 
    for(i = 0; i < count; i ++) 
    { 
        NSString *arrayItem = (NSString *)[arrayFilter objectAtIndex:i]; 
        NSPredicate *filterPredicate = [NSPredicate predicateWithFormat: @"SELF CONTAINS %@", arrayItem]; 
        NSLog(@"Filtered array with filter %@, %@", arrayItem, [arrayContents filteredArrayUsingPredicate: filterPredicate]);                                          
    } 




view plain
二： 
NSArray *arrayFilter2 = [NSArray arrayWithObjects:@"abc1", @"abc2", nil]; 
    NSArray *arrayContent2 = [NSArray arrayWithObjects:@"a1", @"abc1", @"abc4", @"abc2", nil]; 
    NSPredicate *thePredicate2 = [NSPredicate predicateWithFormat:@"NOT (SELF in %@)", arrayFilter2]; 
    NSLog(@"Filtered array with filter %@, %@", arrayFilter2, [arrayContent2 filteredArrayUsingPredicate:thePredicate2]);