踩坑 | swizzling 导致出现 UIImagePicke

错误描述

在实现从相册获取照片的功能时，发现调用 UIImagePickerController 时候报如下错误：

UIImagePickerController UIViewController create error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.webank.wemoney.apple-extension-service was invalidated." 

解决办法

常规Google一下，没有找到类似的解答，就从代码着手分析。

首先想到的是swizzling方法，项目中动态改了一下bundle id:

- (void)modifyBundleId{
    NSLog(@"%@",NSStringFromSelector(_cmd));
    Method originMethod = class_getInstanceMethod([NSBundle class], @selector(bundleIdentifier));
    Method swizzlingMethod = class_getInstanceMethod([NSBundle class], @selector(tk_bundleIdentifier));
    
    BOOL didAddMethod =  class_addMethod([NSBundle class], @selector(bundleIdentifier), method_getImplementation(swizzlingMethod), method_getTypeEncoding(swizzlingMethod));
    
    if (didAddMethod) {
        class_replaceMethod([NSBundle class], @selector(tk_bundleIdentifier), method_getImplementation(originMethod), method_getTypeEncoding(originMethod));
    }else{
        method_exchangeImplementations(originMethod, swizzlingMethod);
    }
}

tk_bundleIdentifier 方法实现如下：

#import "NSBundle+TKBundle.h"
#import <objc/runtime.h>

@implementation NSBundle (TKBundle)

- (NSString *)tk_bundleIdentifier{
    NSLog(@"%@",NSStringFromSelector(_cmd));
    return @"com.tk.test";
}
@end

从项目中移除这个 swizzling，重新run代码，正常了！！！

总结

黑魔法固然好用，但是有很大的副作用，慎用！！！