ios – 在通过委托解除其呈现的模态视图控制器后,在UIViewController中刷新数据

概述由于数据正在从模态传递到呈现视图控制器,因此我有代理工作.但是,呈现视图控制器没有显示从模态接收到的数据.我看了其他帖子,他们说使用委托/协议方法,但不解释如何/为什么呈现VC刷新.我假设我的代理安装不正确.否则,刷新数据的方法是什么？我已经检查并且viewWillAppear和viewDidAppear不被调用. SCCustomerDetailVC.h(提交VC) #import "SCCus 由于数据正在从模态传递到呈现视图控制器,因此我有代理工作.但是,呈现视图控制器没有显示从模态接收到的数据.我看了其他帖子,他们说使用委托/协议方法,但不解释如何/为什么呈现VC刷新.我假设我的代理安装不正确.否则,刷新数据的方法是什么？我已经检查并且vIEwWillAppear和vIEwDIDAppear不被调用.

SCCustomerDetailVC.h(提交VC)

#import "SCCustomersVC.h"@interface SCCustomerDetailVC : UIVIEwController <SCCustomersVCDelegate>@property (atomic,strong) SCCustomer *customer;@property (strong,nonatomic) IBOutlet UIbutton *changeCustomerbutton;- (IBAction)changeCustomerbuttonPress:(UIbutton *)sender;@end

SCCustomerDetailVC.m(提交VC)

- (IBAction)changeCustomerbuttonPress:(UIbutton *)sender {        UINavigationController *customersNC = [self.storyboard instantiateVIEwControllerWithIDentifIEr:@"customersNC"];    SCCustomersVC *customersVC = (SCCustomersVC *)customersNC.topVIEwController;    customersVC.delegate = self;    [self presentVIEwController:customersNC animated:YES completion:nil];}//Protocol methods- (voID)passCustomer:(SCCustomer *)customer{    self.customer = customer;    //At this point,self.customer has the correct reference    [self dismissVIEwControllerAnimated:YES completion:nil];}

SCCustomersVC.h(Modal VC)

#import "SCCustomersVCDelegate.h"@class SCCustomerDetailVC;@interface SCCustomersVC : UIVIEwController <UItableVIEwDelegate,UItableVIEwDataSource,UISearchbarDelegate>@property (weak,nonatomic) ID <SCCustomersVCDelegate> delegate;@end

SCCustomersVC.m(Modal VC)

- (voID)tableVIEw:(UItableVIEw *)tableVIEw dIDSelectRowAtIndexPath:(NSIndexPath *)indexPath{    SCCustomer *customer = [self customerAtIndexPath:indexPath];    [self.delegate passCustomer:customer];}

SCCustomersVCDelegate.h

@class SCCustomer;@protocol SCCustomersVCDelegate <NSObject>@optional- (voID)passCustomer:(SCCustomer *)customer;@end

解决方法 我想你差不多了编辑 – 刚刚学习了 here这个vIEwWillAppear的行为在iOS> 5中有所不同.您仍然希望视图将以您的模型状态更新您的视图,因为它需要在初始演示时执行此 *** 作.

从您的modal vc或委托方法中调用它也可以.所以添加代码来vIEwWillAppear更新视图与视图控制器的模型状态…

// SCCustomerDetailVC.m- (voID)vIEwWillAppear:(BOol)animated {    [super vIEwWillAppear:animated];    // making up an IBOutlet called someLabel    // making up a model method (description) that returns a string representing your model    self.someLabel.text = [self.customer description];}

然后从显示的vc或委托中,调用vIEwVIEwWillAppear：

- (voID)passCustomer:(SCCustomer *)customer{    self.customer = customer;    [self vIEwWillAppear:YES];    [self dismissVIEwControllerAnimated:YES completion:^{}];}

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