实战荟萃-UI篇

一. 前言

平时在处理问题的时候，经常会遇到一些奇奇怪怪的问题，今天在这里将其记录下来。这里将会列举几个常用的UI问题进行讲解

二. 导航栏

iOS导航栏绝对是个巨坑。和很多朋友聊天都是自己实现了一套导航栏。当然，我个人是比较推崇用系统的方法。因为好处好几个:1.新特性推出之后简单易改 2.代码安装包体积的问题

1. 导航栏、状态栏的显示与隐藏

一般直接用系统的导航栏状态栏我们会这么做，优点：使用简单方便

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- (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; //恢复导航栏和状态栏 [self.navigationController setNavigationBarHidden:NO animated:YES]; [[UIApplication sharedApplication] setStatusBarHidden:NO]; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; //隐藏导航栏和状态栏 [self.navigationController setNavigationBarHidden:YES animated:YES]; [[UIApplication sharedApplication] setStatusBarHidden:YES]; } - (BOOL)prefersStatusBarHidden { return YES; }

2. 自定义导航栏

三. 键盘

UITableView上的键盘隐藏与弹起
以前碰到网上的代码实属坑，弹出的时候还有延时。凡事还是得自己动手试一试

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-(void)registerNotifications { //注册通知 CZ_AddObj2DeftNotiCenter(self, @selector(keyboardWillShow:), UIKeyboardWillShowNotification, nil); CZ_AddObj2DeftNotiCenter(self, @selector(keyboardWillHide:), UIKeyboardWillHideNotification, nil); } #pragma mark- TableView - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil]; [tableView deselectRowAtIndexPath:indexPath animated:YES]; } #pragma mark- keyboard - (void)keyboardWillShow:(NSNotification*)notification { NSDictionary* info = [notification userInfo]; CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size; // NSInteger curve = [notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue]; // NSTimeInterval duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; CGRect oldFram = self.cardDetailTableView.frame; self.cardDetailTableView.frame = CGRectMake(oldFram.origin.x,- kbSize.height, oldFram.size.width, oldFram.size.height); UIEdgeInsets contentInsets = UIEdgeInsetsMake(kbSize.height, 0.0, 0.0, 0.0); self.cardDetailTableView.contentInset = contentInsets; self.cardDetailTableView.scrollIndicatorInsets = contentInsets; if(_tableRecognizer) { [_cardDetailTableView removeGestureRecognizer:_tableRecognizer]; } _tableRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)]; _tableRecognizer.numberOfTapsRequired = 1; [_cardDetailTableView addGestureRecognizer:_tableRecognizer]; } - (void)keyboardWillHide:(NSNotification *)notification { // NSDictionary* info = [notification userInfo]; CGRect oldFram = self.cardDetailTableView.frame; self.cardDetailTableView.frame = CGRectMake(oldFram.origin.x, 0.0, oldFram.size.width, oldFram.size.height); self.cardDetailTableView.contentInset = UIEdgeInsetsZero; self.cardDetailTableView.scrollIndicatorInsets = UIEdgeInsetsZero; } - (void)hideKeyboard { [[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil]; if(_tableRecognizer) { _tableRecognizer.delegate = nil; [_cardDetailTableView removeGestureRecognizer:_tableRecognizer]; } }