frame

约束代码混用的问题 无数人趟过此坑，大部分人在坑中一蹶不振，小部分人爬起来也是跌跌撞撞。 有很多人都说auto layout和manual layout的坐标设置是不能混用的，会导致出现布局问题。首先声明一点，autolayout和manuallayout是可以混用的。用的时机很重要，auto layout和manual layout有各自的生命周期和作用域，区分他们两个的作用时间很关键，头脑中一定要清楚你所添加的每条约束，在什么时间场合，会造成什么后果。否则，布局就会和预想的不同，各种奇怪的布局问题也就接踵而至。 1)视图的生命周期顺序 我们在controller视图上面用auto layout添加了一个subview，并在各个系统调用声明周期方法中做了打印处理，结果如下： 其中前面带有“-”符号的表示的是subview视图的打印。 autolayout的作用范围是从上往下第三个方法-updateConstraints一直到viewDidLayoutSubviews,这期间，系统是通过view上的约束来计算view上的布局。而我们一般习惯将布局写在viewDidLoad里面，这就是我们为什么总是无法用manual layout的方法去修改我们的布局。 要想修改布局，必须要在autolayout结束之后才会起作用，否则会被系统将我们的布局按照autolayout重新刷新

Hi im trying to set up a frame animation with a series of images as a background for my splash page in an android application, I would if possible like the code to run on start up. I have been writing the code but get an error that says "frame animation cannot be resolved". The java code I have implemented in my main activity is as follows: @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ImageView frameanimation = (ImageView) findViewById(R.id.frame_animation); AnimationDrawable frame_animation = (AnimationDrawable)

I have been trying to create a simple SpriteKit app using Swift. The purpose is to have a red ball re-locate itself on the screen when clicked on. But the variables self.frame.width and self.frame.height do not return the boundaries of the visible screen. Instead they return boundaries of the whole screen. Because I am choosing the location of the ball at random I need the visible boundaries. Couldn't find an answer after hours of research. How can I achieve this? var dot = SKSpriteNode() let dotScreenHeightPercantage = 10.0 let frameMarginSize = 30.0 override func didMoveToView(view: SKView)