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我希望能够将屏幕上的所有像素设置为特定颜色。我正在使用的方法是创建一个原始数据数组中的所有像素,然后创建一个UIImage,我把它放在UIImageView中。我裁剪的代码到这里面依然呈现出这个问题,我觉得我已经做了一些愚蠢的创建图像,但我看了所有的文件和恕我直言,一切似乎很动听:将原始ARGB像素数据转换为UIImage
结构保存PixelData取出
public struct PixelData {
var a: UInt8 = 255
var r: UInt8
var g: UInt8
var b: UInt8
}
充填阵列左半红色,右半黑色
func halfRood()->[PixelData] {
var data: [PixelData] = []
for(var i = 0; i < Int(Constants.Resolution.x); i++) {
for(var j = 0; j < Int(Constants.Resolution.y); j++) {
if(j < Int(Constants.Resolution.y/2)) {
data.append(PixelData(a: 255, r: 255, g: 0, b: 0))
} else {
data.append(PixelData(a: 255, r: 0, g: 0, b: 0))
}
}
}
return data
}
返回图像从位图
func imageFromARGB32Bitmap(pixels: [PixelData], width: UInt, height: UInt) -> UIImage? {
let bitsPerComponent: UInt = 8
let bitsPerPixel: UInt = 32
let rgbColorSpace = CGColorSpaceCreateDeviceRGB()
let bitmapInfo:CGBitmapInfo = CGBitmapInfo(CGImageAlphaInfo.PremultipliedFirst.rawValue)
var data = pixels
let providerRef = CGDataProviderCreateWithCFData(NSData(bytes: &data, length: data.count * sizeof(PixelData)))
let providerRefthing: CGDataProvider = providerRef
let cgImage = CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, width * UInt(sizeof(PixelData)), rgbColorSpace, bitmapInfo, providerRef, nil, true, kCGRenderingIntentDefault)
let cgiimagething: CGImage = cgImage
return UIImage(CGImage: cgImage)
}
最后设置updateUI()函数
func updateUI() {
let data = halfRood()
if let image = imageFromARGB32Bitmap(data, width: UInt(Constants.Resolution.x), height: UInt(Constants.Resolution.y)) {
imageView?.image = image
}
}
输出类似于下面的图片,而我希望是这样的: [红色半|黑色半]
这是解决方案,非常感谢! – Simon 2015-04-01 12:29:56