iphone – 活动文本字段上的键盘滚动 – 滚动到视图外？

概述我有一个应用程序,其视图具有从视图顶部到视图底部的文本字段.我需要它在编辑底部字段时滚动,以便字段可见,但它似乎无法正常工作. 在Apple docs之后,我将所有代码放入我的程序(清单4-1,4-2),并将scrollView和activeField出口添加到我的头文件并将它们链接到IB. 问题是,当我单击文本字段时,所有文本字段都会退出视图,直到我关闭键盘.它们向下滚动很远(再次,足够远到没有 我有一个应用程序,其视图具有从视图顶部到视图底部的文本字段.我需要它在编辑底部字段时滚动,以便字段可见,但它似乎无法正常工作.

在Apple docs之后,我将所有代码放入我的程序(清单4-1,4-2),并将scrollVIEw和activeFIEld出口添加到我的头文件并将它们链接到IB.

问题是,当我单击文本字段时,所有文本字段都会退出视图,直到我关闭键盘.它们向下滚动很远(再次,足够远到没有任何字段可见的地方).

有谁知道这个问题可能是由什么造成的？

我将代码放在Apple Docs中,这样您就可以确切地看到我正在使用的代码而无需点击.

//my .h    IBOutlet UIScrollVIEw *scrollVIEw;    IBOutlet UITextFIEld *activeFIEld;//.m    // 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 application might not need or want this behavior.    CGRect aRect = self.vIEw.frame;    aRect.size.height -= kbSize.height;    if (!CGRectContainsPoint(aRect,activeFIEld.frame.origin) ) {        CGPoint scrollPoint = CGPointMake(0.0,activeFIEld.frame.origin.y-kbSize.height);        [scrollVIEw setContentOffset:scrollPoint 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;}

解决方法 更新：以下答案已过时.现在您可以使用“ TPkeyboardavoiding”库来处理UIScrollVIEw,UItableVIEw&中的所有类型的文本字段 *** 作.还有很多.尝试一下,让我知道是否有人在集成方面有问题.

老答案

无需为此功能注册键盘通知.为了将活动textFIEld屏幕置于键盘上方,您只需要设置UIscrollVIEw的contentOffset两种方法,如下所示：

// called when textFIEld start editting.- (voID)textFIEldDIDBeginEditing:(UITextFIEld *)textFIEld{    activeFIEld = textFIEld;    [scrollVIEw setContentOffset:CGPointMake(0,textFIEld.center.y-60) animated:YES];}// called when click on the retun button.- (BOol)textFIEldShouldReturn:(UITextFIEld *)textFIEld{    NSInteger nextTag = textFIEld.tag + 1;    // Try to find next responder    UIResponder *nextResponder = [textFIEld.supervIEw vIEwWithTag:nextTag];    if (nextResponder) {        [scrollvIEw setContentOffset:CGPointMake(0,textFIEld.center.y-60) animated:YES];        // Found next responder,so set it.        [nextResponder becomeFirstResponder];    } else {        [scrollvIEw setContentOffset:CGPointMake(0,0) animated:YES];        [textFIEld resignFirstResponder];           return YES;    }    return NO; }

注意：所有TextFIEld都应该有增量标签,如1,2,3等等.并将代表设置为自我.

谢谢,

总结

以上是内存溢出为你收集整理的iphone – 活动文本字段上的键盘滚动 – 滚动到视图外？全部内容，希望文章能够帮你解决iphone – 活动文本字段上的键盘滚动 – 滚动到视图外？所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。