到一個(gè)新公司，最艱難的時(shí)刻就是前一周，項(xiàng)目代碼不熟悉，人也都不認(rèn)識(shí)，關(guān)鍵項(xiàng)目文檔還> 缺失，尼瑪，真是各種不爽

剛?cè)胄鹿緯r(shí)，一般不可能對(duì)項(xiàng)目結(jié)構(gòu)快速掌握，假如任務(wù)是類(lèi)似修改頁(yè)面的bug，就找頁(yè)面對(duì)應(yīng)文件可能就很費(fèi)事，多個(gè)頁(yè)面的話(huà)簡(jiǎn)直能讓人找的上火。如果能迅速定位當(dāng)前頁(yè)面及相關(guān)跳轉(zhuǎn)頁(yè)面文件位置，那么問(wèn)題就能變得簡(jiǎn)單些。

• 使用category動(dòng)態(tài)添加的方法，release時(shí)自動(dòng)關(guān)閉打印位置，對(duì)工程無(wú)影響

• 一鍵導(dǎo)入，只需導(dǎo)入頭文件"UIViewController+SWIZZLocaltion.h"，簡(jiǎn)單方便

• 盡可能詳細(xì)的描述跳轉(zhuǎn)信息，有更詳盡的描述方案敬請(qǐng)留言

核心代碼片段

#ifdef DEBUG
+ (void)load{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Method orginWillAppear = class_getInstanceMethod([self class], @selector(viewWillAppear:));
        Method swizWillAppear = class_getInstanceMethod([self class], @selector(location_viewWillAppear:));
        bool isAddWillAppear = class_addMethod([self class], @selector(viewWillAppear:), method_getImplementation(swizWillAppear), method_getTypeEncoding(swizWillAppear));
        if (isAddWillAppear) {
            class_replaceMethod([self class], @selector(location_viewWillAppear:), method_getImplementation(orginWillAppear), method_getTypeEncoding(orginWillAppear));
        } else {
            method_exchangeImplementations(orginWillAppear, swizWillAppear);
        }
    });
}
#endif

#pragma mark - SwizzMethods
- (void)printViewLocaltiionAndJumpRelation{
    if (![self isKindOfClass:[UITabBarController class]]&&![self isKindOfClass:[UINavigationController class]]) {
        NSString *logStr;
        if ([[self parentViewController] isKindOfClass:[UINavigationController class]]) {
            logStr = @"push跳轉(zhuǎn)";
            if (self.presentingViewController) {
                logStr = @"present+Navi跳轉(zhuǎn)";
            }
            for (UIViewController *viewControl in self.navigationController.viewControllers) {
                logStr = [logStr stringByAppendingFormat:@"-->%@",[viewControl.class description]];
            }
        }else if(self.presentingViewController){//presentingViewController 上一視圖
            logStr = @"present跳轉(zhuǎn)-->";
            if ([self.presentingViewController isKindOfClass:[UINavigationController class]]) {
                UINavigationController *navi = (UINavigationController *)self.presentingViewController;
                logStr = [logStr stringByAppendingFormat:@"%@-->%@",[[navi.viewControllers lastObject].class description],[self.class description]];
            }else{
                logStr = [logStr stringByAppendingFormat:@"%@-->%@",[self.presentingViewController.class description],[self.class description]];
            }
            
        }else{
            logStr = [NSString stringWithFormat:@"未知跳轉(zhuǎn)-->%@",[self.class description]];
        }
        NSLog(@"強(qiáng)大的黑魔法 %@",logStr);
    }
}

最后附上小demo：ViewControllerLocaltion