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NSPredicate

2024-07-31 16:01:14   211人阅读

1 字符串中查出保函某个字节

 NSArray  *array =@[@"123",@"234" , @"345"];

    NSPredicate *predicate = [NSPredicatepredicateWithFormat:@"SELF contains [cd] %@","2"];

   NSArray *filterdArray = [array filteredArrayUsingPredicate:predicate];

   NSLog(@"%@", filterdArray );

2.查找封装model对象的数组，根据model的一个属性

    NSPredicate *predicate = [NSPredicatepredicateWithFormat:@"name == %@","Ansel"];

   NSArray *filteredArray = [array filteredArrayUsingPredicate:predicate];}

3.查询数组中字典莫一个Key的值

    NSArray *array =@[ @{ @"lastName" : @"Turner" },

                        @{@"firstName" : @"Ben",@"lastName" : @"Ballard",

                           @"birthday":@"1972-03-24 10:45:32 +0600" }

                       ];

   NSPredicate *predicate =

    [NSPredicatepredicateWithFormat:@"firstName like %@",@"firstName"];

   NSArray *filteredArray = [array filteredArrayUsingPredicate:predicate];


NSPredicate


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