将元素从一个数组复制到另一个数组

I like to copy the array A elements to Array B elements with specific

我喜欢将数组A元素复制到具有特定的Array B元素

example :

array A=[0123]        
array  b=[1111111111111111111]

i want `b=[1111111101231111111]

我想要`b = [1111111101231111111]

int ip=0;                        
[b addObjectsFromArray:[A objectsAtIndexes:[NSIndexSetindexSetWithIndexesInRange:NSMakeRange(ip, 10)]]];

i know how to copy the array element , i want to know how to replace the object start from 9 to 13 in array b to replaced by array a element , can any give me hint

我知道如何复制数组元素,我想知道如何替换对象从数组b中的9到13开始替换为数组元素,可以任何给我提示

2 个解决方案

#1

    NSArray *a = @[@0,@1,@2,@3];
    NSArray *b = @[@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1];

    NSMutableArray *c = [b mutableCopy];
    // The range here is index->8 (9th object) and length->4
    [c replaceObjectsInRange:NSMakeRange(8,4) withObjectsFromArray:a];

#2

You need to create mutable copy of your array and modify them:

您需要创建数组的可变副本并进行修改:

NSMutableArray* mutableArray = [yourArray mutableCopy];

Then you will access to this methods: https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableArray_Class/Reference/Reference.html

然后您将访问以下方法:https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableArray_Class/Reference/Reference.html

#1

    NSArray *a = @[@0,@1,@2,@3];
    NSArray *b = @[@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1,@1];

    NSMutableArray *c = [b mutableCopy];
    // The range here is index->8 (9th object) and length->4
    [c replaceObjectsInRange:NSMakeRange(8,4) withObjectsFromArray:a];

#2