Question

我试图用一系列点来创建一系列UIButton。 aCoord是一系列积分。对于每个点，我使用其x，y坐标生成UIButton。然后将每个按钮存储在buttonArray中。

            let aCoord:NSMutableArray = self.homeViewData[self.number]["annotations"] as NSMutableArray
            var buttonObjects: NSMutableArray = NSMutableArray()
            var coordx:Float = Float()
            var coordy:Float = Float()


                for item in aCoord {

                    coordx = item[0] as Float
                    coordy = item[1] as Float

                    let button = UIButton.buttonWithType(UIButtonType.System) as UIButton

                    self.button.frame = CGRectMake(CGFloat(coordx),CGFloat(coordy), 60, 60)
                    self.button.setImage(UIImage (named: "tagbutton.png"), forState: .Normal)
                    self.button.addTarget(self, action: "buttonAction", forControlEvents:.TouchUpInside)

                    buttonObjects.addObject(self.button)
                    self.dialogView.addSubview(self.button)

                }

但不知何故，新按钮总是覆盖前一个按钮，如下所示：

<UIButton: 0x7f9269d73bc0; frame = (159 300; 60 60); opaque = NO; layer = <CALayer: 0x7f9269d72d90>>
(
    "<UIButton: 0x7f9269d73bc0; frame = (159 300; 60 60); opaque = NO; layer = <CALayer: 0x7f9269d72d90>>"
)
1
<UIButton: 0x7f9269d73bc0; frame = (154 430.5; 60 60); opaque = NO; layer = <CALayer: 0x7f9269d72d90>>
(
    "<UIButton: 0x7f9269d73bc0; frame = (154 430.5; 60 60); opaque = NO; layer = <CALayer: 0x7f9269d72d90>>",
    "<UIButton: 0x7f9269d73bc0; frame = (154 430.5; 60 60); opaque = NO; layer = <CALayer: 0x7f9269d72d90>>"
)
2

带坐标（154,430.5）的按钮用（159,300）覆盖了该按钮。在Obj-C中看到类似的问题，试过他们的方法但是没有用。我该如何解决？感谢。

Answer 1

请勿在{{1}}循环中使用self.button。只需使用for。

Answer 2

您不应在循环中self之前添加button因为按钮是本地创建的变量而不是类的属性。删除它。

新数据覆盖了NSMutableArray（Swift）中的先前数据

2 个答案: