swift基础语法(09-数组的其它操作)

数组的批量操作

OC:

NSMutableArray *arr =

[NSMutableArray arrayWithObjects:@1, @2, @3, nil];

NSRange range = NSMakeRange(0, 2);

[arr replaceObjectsInRange:range

     withObjectsFromArray:@[@99, @88, @77, @66]];

NSLog(@"%@", arr);

输出结果:

2016-04-01 14:56:45.493 OCTest[3599:667081] (
    99,
    88,
    77,
    66,
    3

)

swift:

var arr = [1, 2, 3]
arr.replaceRange(1..<2, with: [99, 88, 77, 66])

print(arr)

输出结果: [1, 99, 88, 77, 66, 3]

 

var arr = [1, 2, 3]
arr.replaceRange(Range(start: 0, end: 2), with: [99, 88, 77, 66])

print(arr)

输出结果: [99, 88, 77, 66, 3]

 

遍历

OC:

NSArray *arr = @[@1, @2, @3];

for (int i = 0; i < arr.count; i++) {

   NSLog(@"%@", arr[i]);

}

输出结果:

2016-04-01 15:00:10.702 OCTest[3635:694273] 1
2016-04-01 15:00:10.703 OCTest[3635:694273] 2

2016-04-01 15:00:10.703 OCTest[3635:694273] 3

 

 

NSArray *arr = @[@1, @2, @3];

for (NSNumber *number in arr) {

     NSLog(@"%@", number);

}

输出结果:

2016-04-01 15:03:43.192 OCTest[3684:723081] 1
2016-04-01 15:03:43.193 OCTest[3684:723081] 2

2016-04-01 15:03:43.194 OCTest[3684:723081] 3

 

swift:

var arr1 = [1, 2, 3]
for var i = 0 ; i < arr1.count ; i++
{
    print(arr1[i])

}

for number in arr1
{
    print(number)

}

输出结果:

1
2

3

var arr2 = [1, 2, 3]
for number in arr2[0..<3]
{
    print(number)

}

输出结果:

1
2

3