frame

问题 We have a UICollectionView which has a prototype cell on the Storyboard. The cell has a UILabel (" label ") in it, which is positioned without autolayout. We set the frame of the label conditionally in the -collectionView:cellForItemAtIndexPath: with setFrame like this: - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { CategoryCell *cell; cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Category"

问题 Im trying to understand how to make a javascript animation run smoothly and I've been reading some answers around here and I found something I don't understand. Here is the link to the question Smooth javascript animation In the answer with most votes it says "which is why generally it's a good idea to base position/frame on the amount of time that has elapsed since the start of the animation (using new Date().getTime()) rather than moving/changing a fixed amount each frame." Can anyone show

问题 Below is the code for a Window which changes color when the user clicks a button, and changes the text of a label when he clicks the other button. It has two buttons, a panel for holding buttons, a label, and a panel for graphics. Conceptual explanation: First, I added the label to the North part of the frame using the default BorderLayout . Then I added the two buttons in a separate panel, and I added that panel to the South part of the main frame . Then I added the panel for the graphics in

问题 The test command I have is as follows: ffmpeg -i in.mov -vf "drawtext=fontfile=/usr/share/fonts/ttf-bitstream-vera/Vera.ttf: x=(w-tw)/2: y=h-(2*lh)-n: fontcolor=white: fontsize=40: box=1: boxcolor=0x00000000@1: text=" -an -y out.mov I want to display the frame number on each frame. However, setting the "text" variable to "n" does not help (it displays n) and %n seems to be the new line symbol. The thing that confuses me most is that this part y=h-(2*lh)-n works well, meaning it gets the right

问题 I'm looking for a way to make Tkinter Frames behave somewhat like this while resizing: from Tkinter import * w = Tk() w.aspect(1,1,1,1) w.mainloop() So I'd like this code here: import Tkinter as tk from Tkconstants import * r=tk.Tk() content_frame=tk.Frame(r,borderwidth=5,relief=GROOVE) content_frame.grid(row=0,column=0,sticky=(N,S,E,W)) tk.Label(content_frame,text='content').pack() pad_frame=tk.Frame(r,borderwidth=5,relief=GROOVE) pad_frame.grid(row=1,column=0,sticky=(N,S,E,W)) tk.Label(pad

问题 I'm trying to build a function that extracts frames from a video in JavaScript. Here the code I came up with. The function receives a source and a callback. From there, I create a video with the source and I want to draw frames of the video in the canvas with a set interval. Unfortunately, the frames returned are all transparent images. I tried a few different things, but I can't make it work. Can someone help? Thanks. const extractFramesFromVideo = function(src, callback) { var video =

问题 I would like to check if the current environment is the global environment in R. However, direct comparison doesn't seem to work with evironments. What is the best way to do this? #doesn't work sys.frame() == .GlobalEnv 回答1: Matthew Plourde's solution: > identical(sys.frame(),.GlobalEnv) [1] TRUE You can also check names, though this might be less reliable: > environmentName(sys.frame())=="R_GlobalEnv" [1] TRUE 来源： https://stackoverflow.com/questions/14491523/how-to-compare-environment-for

问题 I have an array that count is between 1 to 3 varies. I want to frame them in the middle of the screen with a certain distance Also the width of the labels is fixed let array = ["some1", "some2", "some3"] func setLabel(){ var i = -1 for text in array{ i += 1 let label = UILabel() label.fram = CGRect(x: screenWidth/2 - (CGFloat(i)*50) + 25, y: 100, width: 50 , height: 20) label.text = text addSubview(label) } } 回答1: You can use stackview as suggested by @matt. If you don't want to use stackview

问题 I have a piece of code like this: CGSize lSize = [@"Hello World" sizeWithFont:[UIFont fontWithName:@"Arial" size:13]]; Now I want to have the right frame to see this text in the UITextField . I don't want to change the font size just have the frame for UITextField to fit with this text. I will really appreciate any help 回答1: #define MAIN_FONT_SIZE 17 #define MIN_MAIN_FONT_SIZE 11 #define MAX_TEXT_WIDTH 100 CGPoint point; CGFloat actualFontSize; CGSize size; UIFont *mainFont = [UIFont

问题 Good afternoon :-), I have one Frame. This Frame I dynamically created by Main Form. Main form: Interface := TInterface.Create(self); with handlingInterface do begin Parent := Form1; Left := 0; Top := 35; Width := 570; Height := 250; end; In Frame I have a Thread. I call this Thread from Frame. Why I can synchronize Thread with Frame? There isn't any: var Form1: TForm1; I call Thread inside Frame and I want to change Position of ProgressBar in Frame . I don't know, why I can in Synchronize