**我的需求是点击生成二维码 在下面展示二维码。
部分代码如下,初学golang 请教各位大佬
type MyMainWindow struct {
*walk.MainWindow
hcName *walk.Label
userIdName *walk.Label
startTime *walk.DateEdit
endTime *walk.DateEdit
hc, userId *walk.LineEdit
imageView *walk.ImageView
imageComposite *walk.Composite
qrCount int
}
func (mw *MyMainWindow) ShowQRcode() {
if mw.imageComposite != nil {
mw.imageComposite.Dispose()
}
mw.getQRcode()
widgets := []Widget{}
for i:=1;i<=mw.qrCount;i++ {
bitmap, err := walk.NewBitmapFromFile("qrcode/qr_"+strconv.Itoa(i)+".jpg")
log.Println("qrcode/qr_"+strconv.Itoa(i)+".jpg")
if err != nil {
walk.MsgBox(mw, mw.Title(), err.Error(), walk.MsgBoxIconError)
break
}
widget := ImageView{
Image: bitmap,
Mode: ImageViewModeZoom,
}
widgets = append(widgets, widget)
}
imageComposite := Composite{
AssignTo: &mw.imageComposite,
Layout: HBox{},
Children: widgets,
}
if err := imageComposite.Create(NewBuilder(mw)); err != nil {
log.Println(err)
}
}
func openWindow(){
mw := &MyMainWindow{}
_, _ = MainWindow{
Title: "梅清打印量上报",
MinSize: Size{600, 400},
Size:Size{1200,800},
Layout: VBox{MarginsZero: true},
Children: []Widget{
Composite{
Layout:HBox{},
Children: []Widget{
Label{AssignTo: &mw.hcName,Text: "医院编号"},
LineEdit{AssignTo: &mw.hc,},
Label{AssignTo: &mw.userIdName,Text: "工程师编号"},
LineEdit{AssignTo: &mw.userId,},
DateEdit{AssignTo:&mw.startTime, Format:"yyyy-MM-dd",},
DateEdit{AssignTo:&mw.endTime, Format:"yyyy-MM-dd",},
PushButton{
Text: "生成二维码",
OnClicked: func(){
if len(mw.hc.Text()) == 0 {
walk.MsgBox(mw, mw.Title(), "请输入医院编号", walk.MsgBoxIconError)
log.Println("请输入医院编号")
return
}
if len(mw.userId.Text()) == 0 {
walk.MsgBox(mw, mw.Title(), "请输入工程师编号", walk.MsgBoxIconError)
log.Println("请输入工程师编号")
return
}
mw.ShowQRcode()
},
},
},
},
Composite{
AssignTo:&mw.imageComposite,
Layout:HBox{},
},
},
}.Run()
}
这是报错信息