我想制作我的uiviewcontroller.xib
卷轴.我的视图控制器有8个文本字段.所以我的问题是当我想在第5页写东西时textfield
,我的键盘上的文字区域也是如此.如何摆脱这个问题,让我的viewcontroller滚动?
请详细说明,因为我是iPhone开发的新手.
提前致谢.
以前的所有答案都很棒,但如果您不想将自己与代码混淆,请使用控件.
我喜欢的是:https://github.com/michaeltyson/TPKeyboardAvoiding (Cocoapods:pod'TPKeyboardAvoiding')
您所要做的就是将文本字段嵌入UIScrollView(编辑/嵌入.首先选择您的UITextFields),然后将UIScrollView的类设置为TPKeyboardAvoidingScrollView.
是的,您应该首先学习如何手动完成,但是如果您愿意,可以使用它.
您可以使用ScrollView.
添加滚动视图
将dropView拖放到视图控制器上,就像使用文本字段一样,并调整尺寸以满足您的需要(看起来您希望它填充视图控制器.)
然后将文本字段放入滚动视图.我认为使用左侧的文档大纲最简单.将文本字段拖到滚动视图上,如图所示.
键盘出现时滚动视图滚动
将此代码添加到视图控制器中 viewDidLoad
//register for keyboard notifications [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
并将这些方法添加到视图控制器
// Called when the UIKeyboardDidShowNotification is sent. - (void)keyboardWasShown:(NSNotification*)aNotification { NSDictionary* info = [aNotification userInfo]; CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; [self.scrollView setContentOffset:CGPointMake(0, kbSize.height) animated:YES]; } //called when the text field is being edited - (IBAction)textFieldDidBeginEditing:(UITextField *)sender { sender.delegate = self; }
当显示键盘时,将调用前两个方法.当您开始编辑文本字段时,将调用第二个.
现在转到您的故事板并将文本字段的操作附加到刚刚添加的方法.您可以右键单击文本字段,选择相应的操作并将其拖到方法中.
当您右键单击文本字段时,您应该看到类似的内容.
将此属性添加到视图控制器,然后右键单击从滚动视图拖动到该视图.它允许您的视图控制器控制滚动视图.
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
像这样:
关闭键盘
按下返回按钮后,我们希望键盘关闭.
在您的视图控制器标题中,使您的视图控制器UITextFieldDelegate
像这样:
@interface ViewController : UIViewController <UITextFieldDelegate>
将此代码添加到视图控制器中 viewDidLoad
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
并将这些方法添加到视图控制器
// Called when the UIKeyboardWillHideNotification is sent - (void)keyboardWillBeHidden:(NSNotification*)aNotification { [self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES]; } - (BOOL)textFieldShouldReturn:(UITextField *)textField { return [textField resignFirstResponder]; }
键盘关闭时调用第一种方法.它将滚动视图返回到其原始位置.编辑完文本字段后,将调用第二种方法.它允许在发生这种情况时解除键盘.
更多信息
以下是有关管理键盘的更多信息.
这里是我的ViewController.h供参考
#import <UIKit/UIKit.h> @interface ViewController : UIViewController <UITextFieldDelegate> @end
和ViewController.m
#import "ViewController.h" @interface ViewController () @property (weak, nonatomic) IBOutlet UIScrollView *scrollView; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; //register for keyboard notifications [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil]; } // Called when the UIKeyboardDidShowNotification is sent. - (void)keyboardWasShown:(NSNotification*)aNotification { NSDictionary* info = [aNotification userInfo]; CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; [self.scrollView setContentOffset:CGPointMake(0, kbSize.height) animated:YES]; } // Called when the UIKeyboardWillHideNotification is sent - (void)keyboardWillBeHidden:(NSNotification*)aNotification { [self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES]; } - (IBAction)textFieldDidBeginEditing:(UITextField *)sender { sender.delegate = self; } - (BOOL)textFieldShouldReturn:(UITextField *)textField { return [textField resignFirstResponder]; } @end