当键盘在文本字段上时,ios移动scrollview

概述拜托,你能纠正我的代码,所以我有一个简单的应用程序示例,文本字段在键盘结束时向上移动吗？ 我尝试使用来自ios开发人员库https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.h 拜托,你能纠正我的代码,所以我有一个简单的应用程序示例,文本字段在键盘结束时向上移动吗？

我尝试使用来自ios开发人员库https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html的代码实现它

但我不知道他们的意思是“活动字段存储在自定义变量中(在本例中称为activeFIEld)”并且我可能做了其他错误.在vIEwWillAppear中使用registerForKeyboardNotifications是好的吗？

我知道有一些关于这个问题的线索,但我是新手,我很难理解它们.而且我不想只是学习如何,但为什么,这就是为什么我不想使用github其他建议等的现成的解决方案.

我的代码atm：

.H：

#import <UIKit/UIKit.h>@interface VNVIEwController : UIVIEwController<uiscrollviewdelegate,UITextFIEldDelegate>@property (weak,nonatomic) IBOutlet UITextFIEld *texticek;@property (strong,nonatomic) IBOutlet UIScrollVIEw *scrollVIEw;@end

.M：

#import "VNVIEwController.h"@interface VNVIEwController ()@end@implementation VNVIEwController@synthesize scrollVIEw;@synthesize texticek;- (voID) vIEwWillAppear:(BOol)animated{    [super vIEwWillAppear:animated];    [self registerForKeyboardNotifications];}- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    // Do any additional setup after loading the vIEw,typically from a nib.}- (voID)dIDReceiveMemoryWarning{    [super dIDReceiveMemoryWarning];    // dispose of any resources that can be recreated.}// Call this method somewhere in your vIEw controller setup code.- (voID)registerForKeyboardNotifications{    [[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;    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0,0.0,kbSize.height,0.0);    scrollVIEw.contentInset = contentInsets;    scrollVIEw.scrollindicatorInsets = contentInsets;    // If active text fIEld is hIDden by keyboard,scroll it so it's visible    // Your app might not need or want this behavior.    CGRect aRect = self.vIEw.frame;    aRect.size.height -= kbSize.height;    if (!CGRectContainsPoint(aRect,activeFIEld.frame.origin) ) {        [self.scrollVIEw scrollRectToVisible:activeFIEld.frame animated:YES];    }}// Called when the UIKeyboarDWillHIDeNotification is sent- (voID)keyboarDWillBeHIDden:(NSNotification*)aNotification{    UIEdgeInsets contentInsets = UIEdgeInsetsZero;    scrollVIEw.contentInset = contentInsets;    scrollVIEw.scrollindicatorInsets = contentInsets;}- (voID)textFIEldDIDBeginEditing:(UITextFIEld *)textFIEld{    activeFIEld = textFIEld;}- (voID)textFIEldDIDEndEditing:(UITextFIEld *)textFIEld{    activeFIEld = nil;}@end

解决方法 单击时向上移动文本字段,请使用下面的代码.它只需要你的卷轴的插座

- (voID)textFIEldDIDBeginEditing:(UITextFIEld *)textFIEld {    self.scroll.contentOffset = CGPointMake(0,textFIEld.frame.origin.y);}

您可以通过减去y位置值来更改应显示的文本字段的位置(textfIEld.frame.origin.y – 某个值)

如果要为滚动设置动画,可以这样做：

CGPoint newOffset = CGPointMake(0,textFIEld.frame.origin.y-40);[self.scroll setContentOffset: newOffset animated: YES];

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