The built-in assert can put 2x, 3x pictures, iOS will take different pictures according to various models, 6SPlus will automatically take 3x pictures, and others will take 2x pictures. However, when the 5 and 6 screen sizes are different, they will automatically adapt to the 2x image, and there will inevitably be some problems with the image accuracy. So what I did was put another 5 size picture. Take different pictures according to the situation. Of course, the size of 4 is not considered here.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The built-in assert can put 2x, 3x pictures, iOS will take different pictures according to various models, 6SPlus will automatically take 3x pictures, and others will take 2x pictures. However, when the 5 and 6 screen sizes are different, they will automatically adapt to the 2x image, and there will inevitably be some problems with the image accuracy. So what I did was put another 5 size picture. Take different pictures according to the situation. Of course, the size of 4 is not considered here.