小编o.u*_*inn的帖子

我刚刚下载了Xcode 6 beta 4,我的swift项目编译没有错误,但在它到达我的代码之前,我得到一个dyld_fatal_error就在调用堆栈的开头.

和带有nop指令的汇编代码中的断点

我得到的控制台错误是

dyld: lazy symbol binding failed: Symbol not found: __TFSsa6C_ARGVGVSs13UnsafePointerGS_VSs4Int8__
  Referenced from: /Users/username/Library/Developer/Xcode/DerivedData/Sudoku-dhrdonaeqzsgcvewndimxbbsltnc/Build/Products/Debug/Sudoku.app/Contents/MacOS/Sudoku
  Expected in: /Users/username/Library/Developer/Xcode/DerivedData/Sudoku-dhrdonaeqzsgcvewndimxbbsltnc/Build/Products/Debug/Sudoku.app/Contents/MacOS/../Frameworks/libswift_stdlib_core.dylib

dyld: Symbol not found: __TFSsa6C_ARGVGVSs13UnsafePointerGS_VSs4Int8__
  Referenced from: /Users/username/Library/Developer/Xcode/DerivedData/Sudoku-dhrdonaeqzsgcvewndimxbbsltnc/Build/Products/Debug/Sudoku.app/Contents/MacOS/Sudoku
  Expected in: /Users/username/Library/Developer/Xcode/DerivedData/Sudoku-dhrdonaeqzsgcvewndimxbbsltnc/Build/Products/Debug/Sudoku.app/Contents/MacOS/../Frameworks/libswift_stdlib_core.dylib

只是因为你知道该项目仍在编译,并且在Xcode 6 beta 3中运行良好.

我想用swift做一个虚线.像这样...

var path = NSBezierPath()

path.moveToPoint(NSPoint(x: 1, y: 1))
path.moveToPoint(NSPoint(x: 4, y: 4))

let pattern: ConstUnsafePointer<CGFloat> = {1.0, 1.0} //Not sure how to write this
path.setLineDash(pattern, count: 2, phase: 0.0)

path.stroke()

我的问题是如何制作CGFloats的c数组

我希望能够使用self初始化属性subviewGroup但是这给了我错误:属性'self.gridView'未在super.init调用时初始化

init(frame: NSRect) {
    super.init(frame: frame)
    subviewGroup = GridViewGroup(rows: 9, columns: 9, gridView: self)
}

/***  Properties  ***/
let subviewGroup: GridViewGroup

然后如果我在初始化后把super.init()放到这样的话

init(frame: NSRect) {
    subviewGroup = GridViewGroup(rows: 9, columns: 9, gridView: self)
    super.init(frame: frame)
}

/***  Properties  ***/
let subviewGroup: GridViewGroup

我收到错误:在super.init调用之前使用'self'

我知道我可以使用一个Optional,但是因为在init()调用之后它永远不会是nil似乎没必要.有没有办法正确地做到这一点,而不使subviewGroup成为可选项？

这是一个使用可选的工作示例

/***  Initializers  ***/
init(frame: NSRect) {
    super.init(frame: frame)
    subviewGroup = GridViewGroup(rows: 9, columns: 9, gridView: self)
}

/***  Properties  ***/
let subviewGroup: GridViewGroup?