swift - '(整数，整数 )' is not identical to ' CGPoint'

Question

我收到错误:'(Int, Int)' 与 'CGPoint' 不相同

如何将 (Int, Int) 转换为 CGPoint

let zigzag = [(100,100),
    (100,150),(150,150),
    (150,200)]

override func drawRect(rect: CGRect)
{
    // Get the drawing context.
    let context = UIGraphicsGetCurrentContext()

    // Create the shape (a vertical line) in the context.
    CGContextBeginPath(context)

    //Error is here
    CGContextAddLines(context, zigzag, zigzag.count)

    // Configure the drawing environment.
    CGContextSetStrokeColorWithColor(context,UIColor.redColor().CGColor)

    // Request the system to draw.
    CGContextStrokePath(context)
}

Answer 1

CGContextAddLines() 需要一个 CGPoint 数组。如果你已经有一个(Int, Int) 元组的数组然后你可以用

转换它

let points = zigzag.map { CGPoint(x: $0.0, y: $0.1) }