项目中遇到的问题(一)

做开发的项目中难免会遇到一些问题，把这些遇到过的记录下载，方便下次使用查找，好记性不如烂笔头嘛

1、IQKeyboardManager：

键盘弹起后会出现一个toolbar，这时使用其提供的禁用方法完全无效，

// 全局禁用，没法达到我要的效果
[IQKeyboardManager sharedManager].enable = NO;
[IQKeyboardManager sharedManager].enableAutoToolbar = NO;

在IQKeyboardManager.m的源代码时发现有以下一段代码

-(void)addToolbarIfRequired
{
    CFTimeInterval startTime = CACurrentMediaTime();
    [self showLog:[NSString stringWithFormat:@"****** %@ started ******",NSStringFromSelector(_cmd)]];
    
    //  Getting all the sibling textFields.
    NSArray *siblings = [self responderViews];
    
    [self showLog:[NSString stringWithFormat:@"Found %lu responder sibling(s)",(unsigned long)siblings.count]];

    //Either there is no inputAccessoryView or if accessoryView is not appropriate for current situation(There is Previous/Next/Done toolbar).
    //setInputAccessoryView: check   (Bug ID: #307)
    if ([_textFieldView respondsToSelector:@selector(setInputAccessoryView:)])
    {
        if ([_textFieldView inputAccessoryView] == nil ||
            [[_textFieldView inputAccessoryView] tag] == kIQPreviousNextButtonToolbarTag ||
            [[_textFieldView inputAccessoryView] tag] == kIQDoneButtonToolbarTag)
        { 
          // .....
        }
    }
}

_textFieldView inputAccessoryView] == nil的时候才会去创建toolbar,发现问题就好办了。这时候我们只需要在被响应键盘的textfield中加上 self.inputAccessoryView = [UIView new];

2、跳转至上层控制器

方法一、不推荐

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];

方法二、推荐

for (UIViewController *controller in self.navigationController.viewControllers) { 
   if ([controller isKindOfClass:[你要跳转到的Controller class]]) {       
      [self.navigationControllerpopToViewController:controller animated:YES];   
 }}

方式三、推荐 这种方式可以适合返回指定控制器并调用其方法（比如刷新）

  QDHomeController *homeController = nil;
        for (UIViewController *vc in currentVC.navigationController.viewControllers) {
            if ([vc isKindOfClass:[QDHomeController class]]) {
                 homeController = (QDHomeController*)vc;
                 break;
            }
        }
         [currentVC.navigationController popToViewController:homeController animated:YES];
         [homeController resetSelectedWithIndex:0];