ios 如何#import <NSObjCRuntime.h> 使用 objc_msgSend
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How to #import <NSObjCRuntime.h> to use objc_msgSend
提问by Piotr Czapla
I'd like to import runtime's header to use objc_msgSend but I'm getting:
我想导入运行时的标头以使用 objc_msgSend 但我得到：
error: NSObjCRuntime.h: No such file or directory
Should I add something to the header search path?
我应该在标题搜索路径中添加一些东西吗？
回答by u596219
You'll need to include <objc/message.h>(you'll find the related headers in /usr/include/objc) and link to the objc(/usr/lib/libobjc.dylib) library.
您需要包含<objc/message.h>（您将在 中找到相关标题/usr/include/objc）并链接到objc( /usr/lib/libobjc.dylib) 库。
回答by Maxim Kholyavkin
#import <Foundation/NSObjCRuntime.h>does work
#import <Foundation/NSObjCRuntime.h>确实有效
but you probably need
但你可能需要
#import <objc/runtime.h>
upd: since iOS 7 #import <Foundation/NSObjCRuntime.h>replaced to #import <objc/NSObjCRuntime.h>but i recommend to use #import <objc/runtime.h>anyway
UPD：由于iOS的7#import <Foundation/NSObjCRuntime.h>替换成#import <objc/NSObjCRuntime.h>，但我建议使用#import <objc/runtime.h>反正
回答by DawnSong
When using Xcode 6 and later, you will get an error after #include<objc/message.h>. It can be resolved like this
使用 Xcode 6 及更高版本时，您将在#include<objc/message.h>. 可以这样解决
#include <objc/message.h>
void foo(void *object) {
typedef void (*send_type)(id, SEL, int);
send_type func = (send_type)objc_msgSend;
func(object, sel_getUid("foo:"), 5);
}
http://devstreaming.apple.com/videos/wwdc/2014/417xx2zsyyp8zcs/417/417_whats_new_in_llvm.pdf
http://devstreaming.apple.com/videos/wwdc/2014/417xx2zsyyp8zcs/417/417_whats_new_in_llvm.pdf
