渐变填写Swift for iOS-Charts [英] Gradient Fill in Swift for iOS-Charts
本文介绍了渐变填写Swift for iOS-Charts的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试创建一个漂亮的渐变填充,如ios-charts页面上的演示中所示。但是,我无法在swift vs obj-c中解决这个问题。
这是obj-c代码:
I am trying to create a nice gradient fill as seen in the demos on the ios-charts page. However, I cannot figure this out in swift vs obj-c. Here is the obj-c code:
NSArray *gradientColors = @[
(id)[ChartColorTemplates colorFromString:@"#00ff0000"].CGColor,
(id)[ChartColorTemplates colorFromString:@"#ffff0000"].CGColor
];
CGGradientRef gradient = CGGradientCreateWithColors(nil, (CFArrayRef)gradientColors, nil);
set1.fillAlpha = 1.f;
set1.fill = [ChartFill fillWithLinearGradient:gradient angle:90.f];
现在这是我在swift中的版本:
Now here is my version of that in swift:
let gradColors = [UIColor.cyanColor().CGColor, UIColor.init(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0)]
let colorLocations:[CGFloat] = [0.0, 1.0]
let gradient = CGGradientCreateWithColors(CGColorSpaceCreateDeviceRGB(), gradColors, colorLocations)
我缺少的是:
图表填充fillWithLinearGradient
What I am missing is the : Chart Fill fillWithLinearGradient
我无法在任何地方找到fillWithLinearGradient,所以我我有点困惑。
I can't find the fillWithLinearGradient in the pod anywhere so I am a bit confused.
提前感谢您的帮助!
Rob
Thanks in advance for any help! Rob
推荐答案
完美无缺(Swift 3.1和ios-charts 3.0.1)
let gradientColors = [UIColor.cyan.cgColor, UIColor.clear.cgColor] as CFArray // Colors of the gradient
let colorLocations:[CGFloat] = [1.0, 0.0] // Positioning of the gradient
let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors, locations: colorLocations) // Gradient Object
yourDataSetName.fill = Fill.fillWithLinearGradient(gradient!, angle: 90.0) // Set the Gradient
set.drawFilledEnabled = true // Draw the Gradient
结果
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