bounds

问题 I am attempting to reveal (through animation) a UIView. Specifically I want to show the center portion of the view and then slowly reveal the outer edges of it (sort of like pulling back a curtain). My first attempt was to simply set the bounds rect to be smaller and animate it to be the full size of the view's frame, but this did not have the desired effect since by changing the bounds I was also changing the frame. If what I am trying to do does not sound possible (at least not in a simple

问题 I've read on several posts (like https://stackoverflow.com/a/5340339/1084822 and https://stackoverflow.com/a/15582466/1084822) that to resize a UIView with animation, we can't animate the frame and we must do it with a mix of bounds.size, bounds.origin and position. However, I can't find what is the correlation between those properties and those of the frame. I have a UICollectionView with a custom layout. When a cell is deleted, the layout is refreshed and every cell gets its new frame

问题 I have a cluster marker that defines a bounding rectangle containing a group of markers. The cluster has a center (lat,lon), a marker count and a latitude and longitude span to calculate the bounds. The Google Maps API (JS) has a function called "getBoundsZoomLevel(bounds)" but I cannot find an equivalent method in the Google Maps SDK for Android. How can I estimate the zoom level for given bounds (especially on different devices with different resolutions/densitys)? I've planned that an user

问题 I am loading a splash screen when my app starts. Then I want to load a TabBarController and it's ViewControllers. However, my TabBarController window does not scale to the screen size. Probably 3/4 of the TabBar at the bottom is getting cut off and There is a slim aprox 20 pixel gap at the top of the screen below the status bar. How do I resize the TabBarController properly? Here is the code in my SplashViewController loading the splash view, and the TabBarController: -(void)loadView{ // Init

问题 I'm trying to prove this problem: if an algorithm exists that can determine if a sorted list of n elements has duplicate elements in it, than the number of comparisons needed has a lower bound of n-1 . I'm not quite familiar with lower and higher bounds and I seem to confuse it, can someone help me with an easy to understand proof? 回答1: The problem statement is not rigorous. It should say "the number of comparisons in the worst case ". In a sorted array, there are n-1 relations between pairs

问题 I have started to work on my first Java program, which is a simple calculator, however I get an error claiming that my array is out of bounds. I have tried to debug it to see where and why that is so, as well as following the code on paper, both of which display the results that I would expect and wish for. Therefore, I can not see where the problem actually lies. The code is not complete. According to the debugger, the error occurs at this line: answer = outputNum.get(operationIndex) *

问题 I'm studying iOS' UIView! And I found that I can't understand how bounds works. For example, Please run this code ... and see red box's moving. The red box goes up! and white root view is static! Why!? why red box goes up! ?? please let me know OTL! class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let childView : UIView = UIView(frame: CGRect(x: 50, y: 50, width: 200, height: 200) ) childView.backgroundColor = UIColor.red self.view.addSubview

问题 This question already has answers here : What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it? (4 answers) Closed 12 months ago . I'm aware of what the issue is stating but I am confused to how my program is outputting a value that's outside of the array.. I have an array of ints which is 0 - 8 which means it can hold 9 ints, correct? I have an int which is checked to make sure the users input value is 1-9. I remove one from the integer (like so) if (posStatus

问题 I have view that i want to cover entire screen. And i want to set its frame to cover entire screen. Browsing the stack overflow i found these two different ways of setting view frame to cover the screen: [UIScreen mainScreen].bounds [UIApplcation sharedApplication].keyWindow.bounds It seems to me they are returning same values always, or at least in few test cases I have tried. Currently i am using UIScreen , but i curious to know difference between these calls? Will there be some cases where

问题 Why does int arr[2]={10,20,30,40,50} leads to error? Why can't this initialization escape error by Array Bound Checking? int arr[2] ; arr[0]=10, arr[1]=20, arr[3]=30, arr[4]=40; Doesn't cause error in context to C language by array bound checking? 回答1: There is no runtime array bounds check in C. You are free to obliterate whatever is in memory. The 1st example you show, is a compile-time structure, so the compiler know that you declared an array of size 2, and that the initialization has > 2