Question

import UIKit

let image = UIImage(named: "sample.png")

// Process the image!

var myRGBA = RGBAImage(image: image!)

let avgRed = 122
let avgGreen = 113
let avgBlue = 51

for y in 0..<myRGBA?.height {
    for x in 0..<myRGBA?.width {
        let index = y * (myRGBA?.width)! + x
        var pixel = myRGBA?.pixels[index]
        let redDiff = Int(pixel.red) - avgRed
        if (redDiff>0)
        {
            pixel.red = UInt8( max(0, min(255,avgRed + redDiff * 5)))
            myRGBA?.pixels[index] = pixel
        }
    }
}

let newImage2 = myRGBA?.toUIImage()

错误在于 - ＆gt;二元运算符'..＆lt;'不能应用于'Int'和'Int？'

类型的操作数

RGBAImage运行平稳，没有任何错误

我在swift 3中编写代码

Answer 1

我认为你只需要打开你的选择

import UIKit

let image = UIImage(named: "sample.png")

// Process the image!

var myRGBA = RGBAImage(image: image!)

let avgRed = 122
let avgGreen = 113
let avgBlue = 51
if let unwrapped = myRGBA?{
for y in 0..< unwrapped.height {
    for x in 0..< unwrapped.width {
        let index = y * (myRGBA?.width)! + x
        var pixel = myRGBA?.pixels[index]
        let redDiff = Int(pixel.red) - avgRed
        if (redDiff>0)
        {
            pixel.red = UInt8( max(0, min(255,avgRed + redDiff * 5)))
            myRGBA?.pixels[index] = pixel
        }
    }
}
}
let newImage2 = myRGBA?.toUIImage()

Answer 2

我改变了一些事情，现在下面的代码适合我

google.maps.event.clearInstanceListeners(window);
google.maps.event.clearInstanceListeners(document);

Answer 3

错误原因：

Swift 3.0中默认不支持可选比较。

因此，如果要将代码迁移到Swift 3.0，则需要自己的重载比较运算符或快速迁移器将为您执行此操作。

重载方法如下所示：

library(data.table)
setDT(df)[, z := unlist(lapply(x, function(y) toString(grep(y, s, value = TRUE))))][z=="", z := x][]

我正在尝试快速制作ImageProcessor，但却收到错误

3 个答案: