obj c 编辑数组

Question

我有一个这样的数组：

array[0] = @"object0"
array[1] = @"object1"
array[2] = @"object2"
array[3] = @"object3"

并且： 1.如何删除一个对象，例如array[1]并得到这个：

array[0] = @"object0"
array[1] = @"object1"
array[2] = @"object2"

2.如何将对象移动到其他索引，例如3->1

array[0] = @"object0"
array[1] = @"object3"
array[2] = @"object2"
array[3] = @"object1"

Answer 1

NSMutableArray *array = [@[@"obj0",
                           @"obj1",
                           @"obj2",
                           @"obj3",
                           @"obj4"] mutableCopy];

// Remove object at Index 1
[array removeObject:array[1]];
NSLog(@"%@", array);

// Move item to new index
id object = array[3];
[array removeObjectAtIndex:3];
[array insertObject:object atIndex:1];
NSLog(@"%@", array);

Answer 2

试试 NSMutableArray：

// creation array
NSMutableArray *array = [[NSMutableArray alloc] initWithArray:@[@"object0",@"object1",@"object2",@"object3"]];

// remove object        
[array removeObject:@"object0"];

要移动到其他索引请看这里：NSMutablearray move object from index to index