Runtime 实现函数func方法

#import <objc/objc-runtime.h>

demo下载地址：http://download.youkuaiyun.com/detail/xlsn0w/9429158

typedef void (^xlBlock)(idself, SEL _cmd, NSString *string);

+ (BOOL)resolveInstanceMethod:(SEL)sel {

    

    xlBlock block = ^(idself, SEL _cmd, NSString *string) {

        

        NSLog(@"22%@", string);

        

    };

    

    if (sel == @selector(xlAction:)) {

        class_addMethod([selfclass], @selector(xlAction:),imp_implementationWithBlock(block), "v@:@");

    }

    

    return YES;

}

void xlFunc (idself, SEL _cmd, NSString *string) {

    

    NSLog(@"333xl");

}

- (void)viewDidLoad {

    [superviewDidLoad];

    // Do any additional setup after loading the view.

    

    [selfperformSelector:@selector(xlAction:)withObject:@"xl"];

}