谓词

NSArray *arr = @[@"123",@"32",@"456",@"35"];

NSString *str = @"a2";

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS %@",@"3"];

NSArray *resultArr = [arr filteredArrayUsingPredicate:predicate];//数组过滤

for (NSInteger i = 0; i < resultArr.count; i++) {

NSLog(@"%@",resultArr[i]);

}

if ([predicate evaluateWithObject:str]) {//字符串过滤

NSLog(@"包涵");

}

else {

NSLog(@"不包含");

}