gradient

问题 I want to make a gradient border of view like the following picture: but I don't know how do it exactly , i.e. what the gradient color I should use to do it? how to set my view to show a border like the image? I'm using the following code to get a border: self.view.layer.borderColor = [UIColor orangeColor].CGColor; self.view.layer.borderWidth = 2.0f; 回答1: This what i did and it worked perfectly extension CALayer { func addGradienBorder(colors:[UIColor],width:CGFloat = 1) { let gradientLayer =

问题 I really can not understand what numpy.gradient function does and how to use it for computation of multivariable function gradient . For example, I have such a function: def func(q, chi, delta): return q * chi * delta I need to compute it's 3-dimensional gradient (in other words, I want to compute partial derivatives with respect to all variables (q, chi, delta)). How can I calculate this gradient using NumPy? 回答1: The problem is, that numpy can't give you the derivatives directly and you

问题 In my Application I want to show gradient status bar. Also i have used BottomNavigationView . So issue is when i am doing status bar gradient the bottom navigation bar of android overlaps the BottomNavigationView . I have tried below solutions : how to set status bar background as gradient color or a drawable in android Google Now gradient/shadow on status bar & navigation bar How to apply gradient to status bar in android? How to remove button bar at the bottom screen My code is as below : -

问题 How can I draw such a conical gradient in iOS using Core Graphics / Quartz 2D API? (source: ods.com.ua) 回答1: If anyone is still looking for a solution, Apple finally introduced .conic gradient type in iOS 12. Perfect for masking to create circular progress bar with gradient. Example: let gradientLayer = CAGradientLayer() gradientLayer.startPoint = CGPoint(x: 0.5, y: 0.5) gradientLayer.endPoint = CGPoint(x: 0.5, y: 0) gradientLayer.type = .conic gradientLayer.colors = [UIColor.red.cgColor,

问题 I'm using the internet explorer gradient filter in my CSS. It was all going well until I noticed that images that are supposed to extend beyond their containers overflow:visible; are getting clipped as though the container was set to overflow:hidden; I have no idea why this would happen, or how to fix it. Can anyone help? I'm looking at it in IE8 and IE7 This is the css causing the issue, when I comment it out, no more bug: .box{ filter: progid:DXImageTransform.Microsoft.gradient(GradientType

问题 Not sure what’s happening, but I seem to have an issue with my background seemingly repeating vertically when view from a mobile device OR if you shrink the browser to activate the responsive nature of the site. My Portfolio Website Can anyone give me a hint as to what’s going on here??? 回答1: It's all because height: 100%; In this case alway when you have vertical scroll this will look like this. So I prefer background attachment, and it should work: background-attachment:fixed; 来源： https:/

问题 I have a relatively straight forward implementation of a progress view set up with CALayer objects. The progress view itself is a subview of UIView. Here is the code that sets up the progress ring: self.progressRingLayer = CAShapeLayer() let innerRect = CGRectInset(bounds, CGFloat(self.lineWidth) / 2, CGFloat(self.lineWidth) / 2) let innerPath = UIBezierPath(ovalInRect: innerRect) self.progressRingLayer.path = innerPath.CGPath self.progressRingLayer.fillColor = UIColor.clearColor().CGColor

问题 I'm trying to add a gradient over a leaflet map that will fade from white to transparent and partially obscure it. Using a regular gradient with CSS as a background makes the gradient appear only when the map is reloading. So I tried putting the gradient in the 'foreground' using the accepted answer from this question: Is there a foreground equivalent to background-image in css? This still doesn't work - the map is still sitting on top of it. Can anyone think of a way to do this? thanks.

问题 I have differnet boxes that have a certain double parameter. This parameter should determine what color the box has. The coloring should start with one color for the double value 0.0 (perhaps blue) and should end with another color for 1.0 (perhaps red). It is more or less what is done here or Conditional coloring based on a gradient. There are different ways to define a color as stated in Oracle Docs, but it seems quiet difficult to calculate a gradient with these definitions. Does anyone

问题 I want to generate multiple maps over a base map (TMap). Basically, the same map, but categorized by week. Okay, here's the base code: library(ggplot2) library(ggmap) library(lubridate) map=TMap + geom_point(aes(x=Lon, y=Lat, size=count, color=as.Date(y$`2016-35`$DateTime)), data=y$`2016-35`, alpha=1) + scale_colour_gradient(limits=as.Date(c(min(y$`2016-35`$DateTime), max(y$`2016-35`$DateTime))),low="navy", high="orange", name="Date", trans="date") ggsave(map,path=dir,filename = paste("l",