Swift - 使用纹理数组更改SKSpriteNode纹理

I am trying to animate a SKSpriteNode using an array of textures. What I am trying to achieve is to iterate through the texture array and change the SKSpriteNode texture through each iteration and display it's change for about 1 second. The only problem is, the loop is continuing as the animations are taking place I believe, so I can't see the changes.I am trying to animate a SKSpriteNode using an