获取NSArray的前几个元素，取数组中某个元素

NSArray*smallArray= [largeArray subarrayWithRange:NSMakeRange(0,10)];

NSArray*symptoms = [NSArrayarrayWithArray:[self.dataSource[section]objectForKey:kDataSourceSectionKey]];

self.collectionModelArr= @[@[@"test0",@"test0",@"test0",@"test0",@"test0",@"test0",@"test0",@"test0",@"test0"],@[@"test1",@"test1",@"test1",@"test1",@"test1",@"test1",@"test1",@"test1",@"test1"],@[@"test2",@"test2",@"test2",@"test2",@"test2",@"test2",@"test2",@"test2",@"test2"],@[@"test3",@"test3",@"test3",@"test3",@"test3",@"test3",@"test3",@"test3",@"test3"],@[@"test4",@"test4",@"test4",@"test4",@"test4",@"test4",@"test4",@"test4",@"test4"]];

 NSArray*arr =self.collectionModelArr[2];

 JPLog(@“--打印结果--%@",arr);

--打印结果--(
    test2,
    test2,
    test2,
    test2,
    test2,
    test2,
    test2,
    test2,
    test2
)