警告：由于原型的原因，传递了'objc_setProperty'的参数3 [英] warning: passing argument 3 of 'objc_setProperty' as signed due to prototype

问题描述

在我激活所有警告之后，编译器对此有所抱怨：

The compiler complains about this, after I activated all kind of warnings:

我有一个这样的应用程序委托：

I have an app delegate like this:

#import <UIKit/UIKit.h>

@class MyViewController;

@interface TestAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    MyViewController *myViewController;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet MyViewController *myViewController;

@end

在实现文件中，我具有合成代码：

In the implementation file, I have the synthesize code:

@synthesize window;
@synthesize rootViewController;

在实现文件的末尾，编译器抱怨：

At the end of the implementation file, the compiler complains:

At top level:
warning: passing argument 3 of 'objc_setProperty' as signed due to prototype
warning: passing argument 5 of 'objc_setProperty' with different width due to prototype
warning: passing argument 6 of 'objc_setProperty' with different width due to prototype
warning: passing argument 3 of 'objc_setProperty' as signed due to prototype
warning: passing argument 5 of 'objc_setProperty' with different width due to prototype
warning: passing argument 6 of 'objc_setProperty' with different width due to prototype

$而传递了具有不同宽度的'objc_setProperty'的参数6 b
$ b

是什么意思？我必须为此担心吗？

What does that mean? Must I worry about it?

推荐答案

是的-那是不对的。一点也不。您应该为此担心。

Yes -- that isn't right. Not at all. And you should worry about it.

当您在顶层收到这样的警告时，通常意味着您的头文件中有一些搞砸的错误导致以后出现问题。

When you have a warning like this at the top level, it generally means that there is something screwed up in your header files that is causing problems later.

所以，问题是什么？可能是某个地方的#define。可以是某物的先前声明，特别是某物的声明，试图修复通过#import正确的系统提供的标头可以适当修复的错误。

So, the question is, what? Could be a #define somewhere. Could be a previous declaration of something, specifically a declaration of something in an attempt to fix an error that would be appropriately fixed by #importing the correct system provided header.

添加发出这些警告的完整编译命令行（您可以在Xcode中找到它）。

Add the full compilation command line that spewed those warnings (you can find it in Xcode).

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