微信小程序scrollview软键盘加载会出现滚动条放下会调

1、将scroll-view的scroll-y属性设置为false，这样可以禁用scroll-view的纵向滑动功能，避免滑动条出现。

2、在input组件绑定focus和blur事件，当input组件被聚焦时，将scroll-view组件滚动到输入框所在的位置，当input组件失去聚焦时，将scroll-top值设置为0，这样可以让页面回到最顶部。

无论用VB、Delphi、甚至VC++这个功能都得调用 *** 作系统的Win API函数Hook来实现。

方法是用Hook来勾住系统捕捉到的键盘事件，当发现用户按下的是F12时阻止键盘消息传递来实现F12不响应的。

以下钩子程序能阻止除ctrl alt del以外的所有键盘消息

Option Explicit

Private Declare Function CallNextHookEx Lib "user32 " _

(ByVal hHook As Long, _

ByVal nCode As Long, _

ByVal wParam As Long, _

lParam As Any) As Long

Private Declare Function SetWindowsHookEx Lib "user32 " _

Alias "SetWindowsHookExA " _

(ByVal idHook As Long, _

ByVal lpfn As Long, _

ByVal hmod As Long, _

ByVal dwThreadId As Long) As Long

Private Declare Function UnhookWindowsHookEx Lib "user32 " _

(ByVal hHook As Long) As Long

Private Declare Sub CopyMemory Lib "kernel32 " _

Alias "RtlMoveMemory " _

(Destination As Any, _

Source As Any, _

ByVal Length As Long)

Private Type PKBDLLHOOKSTRUCT

vkCode As Long

scanCode As Long

flags As Long

time As Long

dwExtraInfo As Long

End Type

Private Const WM_KEYDOWN = &H100

Private Const WM_SYSKEYDOWN = &H104

Private Const WM_KEYUP = &H101

Private Const WM_SYSKEYUP = &H105

Private Const VK_LWIN = &H5B

Private Const VK_RWIN = &H5C

Private Const HC_ACTION = 0

Private Const WH_KEYBOARD_LL = 13

Private lngHook As Long

'使用底层KeyboardHook拦截按键消息

Public Function LowLevelKeyboardProc(ByVal nCode As Long, _

ByVal wParam As Long, _

ByVal lParam As Long) As Long

Dim blnHook As Boolean

Dim p As PKBDLLHOOKSTRUCT

If nCode = HC_ACTION Then

Select Case wParam

Case WM_KEYDOWN, WM_SYSKEYDOWN, WM_KEYUP, WM_SYSKEYUP

Call CopyMemory(p, ByVal lParam, Len(p))

If pvkCode = VK_LWIN Or pvkCode = VK_RWIN Then '按下了左/右Win键

blnHook = True

End If

Case Else

'do nothing

End Select

End If

If blnHook Then

LowLevelKeyboardProc = 1

Else

Call CallNextHookEx(WH_KEYBOARD_LL, nCode, wParam, lParam)

End If

End Function

Public Sub HooK()

lngHook = SetWindowsHookEx(WH_KEYBOARD_LL, _

AddressOf LowLevelKeyboardProc, _

ApphInstance, _

0)

End Sub

Public Sub UnHooK()

Call UnhookWindowsHookEx(lngHook)

End Sub

'

'把以下程序粘贴到窗体中

'

Private Sub Form_Load()

Hook

End Sub

Private Sub Form_Unload(Cancel As Integer)

UnHook

End Sub

我们在进入某个页面时，希望可以定位到某一个Input输入框中，并且实现软键盘自动d出，在小程序中如何实现呢？

这里我们主要使用到属性是Input控件中的focus属性，我们将focus的值设为 true是，自动获得焦点同时d起键盘

这里需要用到wxhideKeyboard()方法，比如我们想实现用户输入123后自动收起键盘，实现方式如下

wxml文件中

js文件中

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