ios - Swift - 如何将 ConstUnsafePointer<()> 转换为 CTRunRef

Question

我打算将 ConstUnsafePointer<()> 转换为 CTRunRef，但出现错误

var run: CTRunRef = CFArrayGetValueAtIndex(runArray, runIndex) as CTRunRef

编译器说:“ConstUnsafePointer<()>”不能转换为“CTRunRef”

Answer 1

这样看

let runArray = ((CTLineGetGlyphRuns(line) as [AnyObject]) as! [CTRunRef])
for runIndex in 0..<CFArrayGetCount(runArray) {
    let run: CTRunRef = runArray[runIndex]
}