尝试编写 Unity iOS 插件时出现 Malloc 错误

Question

尝试编写一个快速的Unity插件以从剪贴板中获取数据，有问题的函数如下：

extern "C"
{
const char * _importString()
{
UIPasteboard *result = [UIPasteboard generalPasteboard];
NSString * resultString = [result string];
return [resultString UTF8String];
}
}

但是，当我激活该功能时，它给了我以下错误：

GfxDevice: creating device client; threaded=1
Initializing Metal device caps: Apple A9 GPU
Initialize engine version: 2017.1.0f3 (472613c02cf7)
2017-08-26 13:46:21.395230+0100 ProductName[8608:2930827] [Common] _BSMachError: port 5e03; (os/kern) invalid capability (0x14) "Unable to insert COPY_SEND"
2017-08-26 13:46:21.400889+0100 ProductName[8608:2930827] [Common] _BSMachError: port 5e03; (os/kern) invalid capability (0x14) "Unable to insert COPY_SEND"
UnloadTime: 4.034333 ms
ProductName(8608,0x1b8100b40) malloc: *** error for object 0x1740a6191: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

主要用Unity C编写，所以对iOS插件知之甚少，也不知道从哪里开始，任何帮助表示赞赏。

编辑：

对于那些在家玩的人，这里有相关的 Unity 代码段：

[DllImport("__Internal")]
private static extern string _importString();
//retrieves the clipboard contents from xcode
public string iPhoneImportClipboard()
{
return _importString();
}

Answer 1

-string的结果不得被视为恶意指针。

您需要malloc缓冲区并在返回之前strcpy所述字符串。

---

extern "C"
{
const char * _importString()
{
UIPasteboard *result = [UIPasteboard generalPasteboard];
NSString * resultString = [result string];
return strdup([resultString UTF8String]);
}
}