ios7 – 在inputAccessoryView上将来自UITextField的文本 – UIToolBar镜像到navigationController.toolbar上的UITextField上的文本

概述在我的应用程序中,我在navigationController工具栏上有一个UITextField. #import "ViewController.h"@interface ViewController ()@property (nonatomic,strong) NSArray *toolBarButtonItems;@property (nonatomic,strong) UITe 在我的应用程序中,我在navigationController工具栏上有一个UITextFIEld.

#import "VIEwController.h"@interface VIEwController ()@property (nonatomic,strong) NSArray *toolbarbuttonItems;@property (nonatomic,strong) UITextFIEld *textFIEld;@property (nonatomic,strong) UITextFIEld *textFIEld2;@end@implementation VIEwController- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    // Do any additional setup after loading the vIEw,typically from a nib.    self.textFIEld = [[UITextFIEld alloc]initWithFrame:CGRectMake(0,60,40)];    self.textFIEld.delegate = self;    self.textFIEld.borderStyle = UITextborderStyleRoundedRect;    UIbarbuttonItem *flexibleSpace = [[UIbarbuttonItem alloc]initWithbarbuttonSystemItem:UIbarbuttonSystemItemFlexibleSpace target:nil action:nil];    UIbarbuttonItem *barbuttonItem = [[UIbarbuttonItem alloc]initWithCustomVIEw:self.textFIEld];    self.toolbarbuttonItems = @[flexibleSpace,barbuttonItem,flexibleSpace];    self.toolbaritems = self.toolbarbuttonItems;    self.navigationController.toolbar.barTintcolor = [UIcolor bluecolor];    [self.navigationController setToolbarHIDden:NO animated:NO];}

单击textFIEld时,键盘打开,我用另一个textFIEld创建一个新的inputAccessoryVIEw工具栏.

-(UIToolbar *)addToolbar{    UIToolbar *toolbar = [[UIToolbar alloc]initWithFrame:self.navigationController.toolbar.frame];    toolbar.barTintcolor = [UIcolor darkGraycolor];    self.textFIEld2 = [[UITextFIEld alloc]initWithFrame:CGRectMake(0,40)];    self.textFIEld2.delegate = self;    self.textFIEld2.borderStyle = UITextborderStyleRoundedRect;    UIbarbuttonItem *flexibleSpace = [[UIbarbuttonItem alloc]initWithbarbuttonSystemItem:UIbarbuttonSystemItemFlexibleSpace target:nil action:nil];    UIbarbuttonItem *barbuttonItem = [[UIbarbuttonItem alloc]initWithCustomVIEw:self.textFIEld2];    [toolbar setItems:@[flexibleSpace,flexibleSpace]];    return toolbar;}

我的想法是将firstResponder更改为inputAccessoryVIEw上的textFIEld,这样我就可以看到我正在编辑的内容.我之所以这样做是因为我无法将导航工具栏向上滚动到键盘上,我想看到我正在编辑的文本.

-(voID)textFIEldDIDBeginEditing:(UITextFIEld *)textFIEld{    textFIEld.inputAccessoryVIEw = [self addToolbar];    if(self.textFIEld2.isFirstResponder != NO){        [self.textFIEld2 becomeFirstResponder];    }}

当我单击navigationController工具栏中的textFIEld时,它似乎不起作用.新的inputAccessoryVIEw工具栏显示在键盘上,但我无法编辑该字段,因为响应者似乎没有更改.返回键也不起作用.我必须打两次才能关闭键盘,当我这样做时,文本在两个文本字段之间不匹配.

-(BOol)textFIEldShouldReturn:(UITextFIEld *)textFIEld{    [textFIEld resignFirstResponder];    self.textFIEld.text = self.textFIEld2.text;    return YES;}

解决方法 我让它像这样工作：

#import "KJMVIEwController.h"@interface KJMVIEwController ()@property (strong,nonatomic) UITextFIEld *textFIEld1;@property (strong,nonatomic) UITextFIEld *textFIEld2;@end@implementation KJMVIEwController- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    self.textFIEld1 = [[UITextFIEld alloc]initWithFrame:CGRectMake(30,7,260,30)];    self.textFIEld1.borderStyle = UITextborderStyleRoundedRect;    self.textFIEld1.delegate = self;    UIToolbar *navToolbar = self.navigationController.toolbar;    [navToolbar addSubvIEw:self.textFIEld1];    UIToolbar *toolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0,320,44)];    self.textFIEld2 = [[UITextFIEld alloc]initWithFrame:CGRectMake(30,30)];    self.textFIEld2.borderStyle = UITextborderStyleRoundedRect;    self.textFIEld2.delegate = self;    [toolbar addSubvIEw:self.textFIEld2];    self.textFIEld1.inputAccessoryVIEw = toolbar;    [[NSNotificationCenter defaultCenter]addobserver:self selector:@selector(firstRes:) name:UIKeyboardDIDShowNotification object:nil];}- (voID)firstRes:(ID)sender{    [self.textFIEld2 becomeFirstResponder];}- (voID)textFIEldDIDEndEditing:(UITextFIEld *)textFIEld{}- (BOol)textFIEldShouldReturn:(UITextFIEld *)textFIEld{    if (textFIEld == self.textFIEld2) {        self.textFIEld1.text = self.textFIEld2.text;    }    [textFIEld resignFirstResponder];    [self.textFIEld1 resignFirstResponder];    return YES;}- (voID)vIEwDIDdisappear:(BOol)animated{    [[NSNotificationCenter defaultCenter]removeObserver:self forKeyPath:UIKeyboardDIDShowNotification];    [super vIEwDIDdisappear:animated];}@end

这是vIEwDIDLoad中发生的事情：

>初始化工具栏和textFIEld2
>在这里设置textFIEld1的inputAccessory(键盘隐藏的那个),这样它就可以成为firstResponder

然后在vIEwDIDAppear方法中：

注册键盘显示时发送的通知.然后,您将在“firstRes”方法中编写一些代码,以使textFIEld2成为firstResponder.您需要使用此通知将其设置为firstResponder,因为此时您知道它在视图层次结构中,这意味着它可以成为firstResponder.在 – (voID)textFIEldDIDBeginEditing中调用它：(UITextFIEld *)textFIEld似乎在textFIEld2出现在屏幕上之前触发它,这意味着它不能成为firstResponder.我们在vIEwDIDAppear方法中注册它,因为我们只想在屏幕上显示通知.

在textFIEld2 resignsFirstResponder之后,textFIEld1再次成为第一个响应者,因此您必须在textFIEldShouldReturn方法中调用resignFirstResponder两次.

此外,如果我们离开屏幕,我们需要在vIEwDIDdisappear方法中删除自己作为键盘通知的观察者.

这是我在Xcode中创建的项目的链接,因此您可以看到它是如何工作的：

https://github.com/kylejm/UIToolBar-UITextView

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