Swift 2.2 CGFloat中的C样式循环的替换 [英] Replacement for C-style loop in Swift 2.2 CGFloat

问题描述

我已经使用CGFloat尝试了此操作，但出现以下错误:无法使用类型为'((CGFloat by:CGFloat)')的参数列表来调用步幅

I have tried this with CGFloat and i am getting the following error: Can not invoke stride with an argument list of type '(CGFloat by: CGFloat)'

for var min:CGFloat = 0.0; min<=45.0; min = min+value {

print("\(min)")
}

收件人:

for min:CGFloat in 0.stride(CGFloat(55.0), by: min+value) {

   print("\(min)")
}

推荐答案

以下是跨步的最新重载.您可以将数字强制转换为CGFloat.

Below is the latest overload for stride. You can use cast the number to CGFloat for the stride.

for min in (0 as CGFloat).stride(to: 55, by: value) {
    print("\(min)")
}

但是，在for循环开始时，跨步会返回Striable. by值不会随着for循环的迭代而更新.在这种情况下，使用while循环会更好，

However, stride returns a Striable when the for-loop begin. The by value does not update with the iteration of for-loop. A while-loop would be better for this case,

var min : CGFloat = 0

while (min < 55) {
    print("\(min)")
    min += value
}

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