iphone - 将三个不同的数组复制到一个数组

Question

我有三个array..say array1，array2，array3。所有这些数组都包含字典。现在，我想将这些数组的所有对象复制到一个数组中并显示在表格视图中。我的问题是我将如何将这三个数组复制到 1 中。说；

NSMutableArray *array1 = [NSMutableArray arrayWithObject:Dict1];
    NSMutableArray *array2 = [NSMutableArray arrayWithObject:Dict2];
    NSMutableArray *array3 = [NSMutableArray arrayWithObject:Dict3];   

现在，我想将array1、array2、array3 的包含复制到array4。我将如何执行此操作。

Answer 1

用这个

NSMutableArray *array4 = [[NSMutableArray alloc] init];
[array4 addObjectsFromArray:array1];
[array4 addObjectsFromArray:array2];
[array4 addObjectsFromArray:array3];

//Do something on array4

[array4 release];

Answer 2

NSMutableArray *allObjs = [[NSMutableArray alloc] initWithArray: array1];
[allObjs addObjectsFromArray: array2];
[allObjs addObjectsFromArray: array3];

Answer 3

NSMutableArray *array4 = [[NSMutableArray alloc] init];

for (int i = 0; i < [array1 count]; i++)
{
    [array4 addObject:[array1 objectAtIndex:i]];
}
for (int i = 0; i < [array2 count]; i++)
{
    [array4 addObject:[array2 objectAtIndex:i]];
}
for (int i = 0; i < [array3 count]; i++)
{
    [array4 addObject:[array3 objectAtIndex:i]];
}

//use your array4

 [array4 release];

Answer 4

NSMutableArray * array4 = [NSMutableArray arrayWithObjects:[array1 objectAtIndex:0], [array2 objectAtIndex:0], [array3 objectAtIndex:0]];