Ios 调用原始方法时,Xamarin方法在设备上切换失败
以下代码在模拟器中工作,但在调用_originalSetTextMethodself、stringParam时在设备上失败 我怀疑问题与此相关,但无法确定C中的适当语法: 有谁能给我一些建议,告诉我如何在设备上运行这个程序?谢谢Ios 调用原始方法时,Xamarin方法在设备上切换失败,ios,xamarin.ios,arm64,method-swizzling,Ios,Xamarin.ios,Arm64,Method Swizzling,以下代码在模拟器中工作,但在调用_originalSetTextMethodself、stringParam时在设备上失败 我怀疑问题与此相关,但无法确定C中的适当语法: 有谁能给我一些建议,告诉我如何在设备上运行这个程序?谢谢 public static class SetTextSwizzle { [DllImport("/usr/lib/libobjc.dylib")] extern static IntPtr class_getInstanceMethod(IntPtr
public static class SetTextSwizzle
{
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr class_getInstanceMethod(IntPtr classHandle, IntPtr Selector);
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr imp_implementationWithBlock(ref BlockLiteral block);
[DllImport("/usr/lib/libobjc.dylib")]
extern static OriginalDelegate method_setImplementation(IntPtr method, IntPtr imp);
static OriginalDelegate _originalSetTextMethod;
[MonoNativeFunctionWrapper]
public delegate void OriginalDelegate(IntPtr one, IntPtr two);
delegate void CaptureDelegate(IntPtr block, IntPtr self, IntPtr paramOne);
public static void Initialise() {
OverrideSetText();
}
static void OverrideSetText()
{
var method = class_getInstanceMethod(new UILabel().ClassHandle, new Selector("setText:").Handle);
var block_value = new BlockLiteral();
CaptureDelegate d = SetTextAndFont;
block_value.SetupBlock(d, null);
var imp = imp_implementationWithBlock(ref block_value);
_originalSetTextMethod = method_setImplementation(method, imp);
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void SetTextAndFont(IntPtr block, IntPtr self, IntPtr stringParam)
{
var label = (UILabel)Runtime.GetNSObject(self);
label?.SetFont();
_originalSetTextMethod(self, stringParam);
}
}
尝试将MononNativeFunctionWrapper属性添加到CaptureDelegate [单本地函数包装器]
委托无效CaptureDelegateIntPtr块、IntPtr自身、IntPtr参数 这就是最终为我工作的代码。它有点复杂,因为它需要避免意外的周期性调用
using System;
using ObjCRuntime;
using UIKit;
using System.Runtime.InteropServices;
using Foundation;
using System.Diagnostics;
public static class SetTextSwizzle
{
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr class_getInstanceMethod(IntPtr classHandle, IntPtr Selector);
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr method_getImplementation(IntPtr method);
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr class_addMethod(IntPtr classPointer, IntPtr selector, IntPtr implementation, char[] typeEncoding);
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr imp_implementationWithBlock(ref BlockLiteral block);
[DllImport("/usr/lib/libobjc.dylib")]
extern static IntPtr method_setImplementation(IntPtr method, IntPtr imp);
[DllImport("/usr/lib/libobjc.dylib", EntryPoint = "objc_msgSend")]
static extern void CallOriginalMethod(IntPtr receiver, IntPtr selector, IntPtr symbol);
delegate void CaptureDelegate(IntPtr block, IntPtr self, IntPtr paramOne);
static readonly char[] _objCVoidReturnEncoding = { 'v', '@', ':' };
static readonly IntPtr _setTextHandle = new Selector("setText:").Handle;
static readonly IntPtr _setAttributedTextHandle = new Selector("setAttributedText:").Handle;
static readonly IntPtr _setTextOrigHandle = new Selector("setTextOrig:").Handle;
static readonly IntPtr _setAttributedTextOrigHandle = new Selector("setAttributedTextOrig:").Handle;
public static void Initialise() {
OverrideSetText();
OverrideSetAttributedText();
OverrideTextFieldSetText();
OverrideTextViewSetText();
OverrideTextViewSetAttributedText();
}
static IntPtr GetNewImplementation(CaptureDelegate newMethod) {
var block_value = new BlockLiteral();
block_value.SetupBlock(newMethod, null);
return imp_implementationWithBlock(ref block_value);
}
static void OverrideSetText()
{
var originalMethod = class_getInstanceMethod(new UILabel().ClassHandle, _setTextHandle);
var originalImplementation = method_getImplementation(originalMethod);
class_addMethod(new UILabel().ClassHandle, _setTextOrigHandle, originalImplementation, _objCVoidReturnEncoding);
method_setImplementation(originalMethod, GetNewImplementation(SetTextAndFont));
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void SetTextAndFont(IntPtr block, IntPtr self, IntPtr stringParam)
{
var label = (UILabel)Runtime.GetNSObject(self);
if (label != null)
{
label.SetFont();
CallOriginalMethod(label.Handle, _setTextOrigHandle, stringParam);
}
}
static void OverrideSetAttributedText()
{
var originalMethod = class_getInstanceMethod(new UILabel().ClassHandle, _setAttributedTextHandle);
var originalImplementation = method_getImplementation(originalMethod);
class_addMethod(new UILabel().ClassHandle, _setAttributedTextOrigHandle, originalImplementation, _objCVoidReturnEncoding);
method_setImplementation(originalMethod, GetNewImplementation(SetTextAttributedAndFont));
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void SetTextAttributedAndFont(IntPtr block, IntPtr self, IntPtr attrStringParam)
{
var label = (UILabel)Runtime.GetNSObject(self);
var attrSringObject = (NSAttributedString)Runtime.GetNSObject(attrStringParam);
if (label != null && attrSringObject != null)
{
var customFontString = label.AttributedStringWithCustomFont(attrSringObject);
CallOriginalMethod(label.Handle, _setAttributedTextOrigHandle, customFontString.Handle);
}
}
static void OverrideTextFieldSetText()
{
var originalMethod = class_getInstanceMethod(new UITextField().ClassHandle, _setTextHandle);
var originalImplementation = method_getImplementation(originalMethod);
class_addMethod(new UITextField().ClassHandle, _setTextOrigHandle, originalImplementation, _objCVoidReturnEncoding);
method_setImplementation(originalMethod, GetNewImplementation(SetTextFieldTextAndFont));
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void SetTextFieldTextAndFont(IntPtr block, IntPtr self, IntPtr stringParam)
{
var field = (UITextField)Runtime.GetNSObject(self);
if (field != null)
{
field.SetFont();
CallOriginalMethod(field.Handle, _setTextOrigHandle, stringParam);
}
}
static void OverrideTextViewSetText()
{
var originalMethod = class_getInstanceMethod(new UITextView().ClassHandle, _setTextHandle);
var originalImplementation = method_getImplementation(originalMethod);
class_addMethod(new UITextView().ClassHandle, _setTextOrigHandle, originalImplementation, _objCVoidReturnEncoding);
method_setImplementation(originalMethod, GetNewImplementation(SetTextViewTextAndFont));
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void SetTextViewTextAndFont(IntPtr block, IntPtr self, IntPtr stringParam)
{
var textView = (UITextView)Runtime.GetNSObject(self);
if (textView != null)
{
textView.SetFont();
CallOriginalMethod(textView.Handle, _setTextOrigHandle, stringParam);
}
}
static void OverrideTextViewSetAttributedText()
{
var originalMethod = class_getInstanceMethod(new UITextView().ClassHandle, _setAttributedTextHandle);
var originalImplementation = method_getImplementation(originalMethod);
class_addMethod(new UITextView().ClassHandle, _setAttributedTextOrigHandle, originalImplementation, _objCVoidReturnEncoding);
method_setImplementation(originalMethod, GetNewImplementation(TextViewSetTextAttributedAndFont));
}
[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void TextViewSetTextAttributedAndFont(IntPtr block, IntPtr self, IntPtr attrStringParam)
{
var textView = (UITextView)Runtime.GetNSObject(self);
var attrSringObject = (NSAttributedString)Runtime.GetNSObject(attrStringParam);
if (textView != null && attrSringObject != null)
{
var customFontString = textView.AttributedStringWithCustomFont(attrSringObject);
CallOriginalMethod(textView.Handle, _setAttributedTextOrigHandle, customFontString.Handle);
}
}
}```
这里也有同样的问题。同时你找到解决方案了吗?嗨@tipa我已经发布了下面的代码。那是很久以前的事了,所以我忘了具体是什么为我解决的,但我相信问题在于参数是如何编码并传递给Obj-C的,处理器架构中的切换产生了影响。有很多尝试和错误。希望您能在代码中找到一些东西,为您指明正确的方向。