如何从NSArray中删除括号？

Question

我有一个数组包含每个索引的数组.

array is :(
        (
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-19g1.jpg",
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-20g2.jpg",
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-20g3.jpg"
    ),
        (
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-49y1.jpg",
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-50y2.jpg"
    ),
        (
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-50y3.jpg",
        "http://localhost/ColorPicker/upload/2014-01-14-04-01-51y6.jpg"

    )
)

我想制作一个类似的数组

  (  
"http://localhost/ColorPicker/upload/2014-01-14-04-01-50y3.jpg",
"http://localhost/ColorPicker/upload/2014-01-14-04-01-51y6.jpg", 
"http://localhost/ColorPicker/upload/2014-01-14-04-01-50y3.jpg",
"http://localhost/ColorPicker/upload/2014-01-14-04-01-51y6.jpg",                    
"http://localhost/ColorPicker/upload/2014-01-14-04-01-50y3.jpg",
"http://localhost/ColorPicker/upload/2014-01-14-04-01-51y6.jpg"
    )

如何在数组中消除(),()并创建包含url的单个数组.

Answer 1

你需要创建一个新的数组:

NSMutableArray *newArray = [[NSMutableArray alloc] init];
for (NSArray *a in array)
    [newArray addObjectsFromArray:a];

Answer 2

您可以使用键值编码运算符"@unionOfArrays"来展平数组:

NSArray *nested = @[@[@"A1", @"A2", @"A3"], @[@"B1", @"B2", @"B3"], @[@"C1", @"C2", @"C3"]];
NSArray *flattened = [nested valueForKeyPath:@"@unionOfArrays.self"];

NSLog(@"nested = %@", nested);
NSLog(@"flattened = %@", flattened);

输出:

nested = (
        (
        A1,
        A2,
        A3
    ),
        (
        B1,
        B2,
        B3
    ),
        (
        C1,
        C2,
        C3
    )
)
flattened = (
    A1,
    A2,
    A3,
    B1,
    B2,
    B3,
    C1,
    C2,
    C3
)