UITextView 的创建和键盘禁用

UITextView 使用方法和禁用键盘

  (2012-03-30 20:18:47) [ 编辑] [ 删除]

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标签：  it

分类： iphone开发

1.创建并初始化
创建UITextView的文件，并在.h文件中写入如下代码：

 #import <UIKit/UIKit.h>



 @interface TextViewController : UIViewController <UITextViewDelegate>{

       UITextView *textView;

 }

 

 @property (nonatomic, retain) UITextView *textView; 

 

 @end

 在.m文件中初始化这个textview，写入代码如下：

  self.textView = [[[UITextView  alloc] initWithFrame:self.view.frame] autorelease]; //初始化大小并自动释放
  

  self.textView.textColor = [UIColor blackColor];//设置textview里面的字体颜色  
 

  self.textView.font = [UIFont fontWithName:@"Arial" size:18.0];//设置字体名字和字体大小  
 

 self.textView.delegate = self;//设置它的委托方法  
 

 self.textView.backgroundColor = [UIColor whiteColor];//设置它的背景颜色

 self.textView.text = @"Now is the time for all good developers to come to serve their country.\n\nNow is the time for all good developers to come to serve their country.";//设置它显示的内容  

 self.textView.returnKeyType = UIReturnKeyDefault;//返回键的类型  

 self.textView.keyboardType = UIKeyboardTypeDefault;//键盘类型  

 self.textView.scrollEnabled = YES;//是否可以拖动  
 

 self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;//自适应高度
 

 [self.view addSubview: self.textView];//加入到整个页面中 

 

禁用键盘

self.textView.editable=NO;

 

2. UITextView退出键盘的几种方式

（1）如果你程序是有导航条的，可以在导航条上面加多一个Done的按钮，用来退出键盘，当然要先实现UITextViewDelegate。

- (void)textViewDidBeginEditing:(UITextView *)textView {    



   UIBarButtonItem *done =    [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(leaveEditMode)] autorelease];    



   self.navigationItem.rightBarButtonItem = done;        



}    



- (void)textViewDidEndEditing:(UITextView *)textView {    



    self.navigationItem.rightBarButtonItem = nil;  



} 



- (void)leaveEditMode {



    [self.textView resignFirstResponder];   



} 

复制代码

（2）如果你的textview里不用回车键，可以把回车键当做退出键盘的响应键。

#pragma mark - UITextView Delegate Methods     



-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{    



    if ([text isEqualToString:@"\n"]) {    



        [textView resignFirstResponder];    



        return NO;    



    }



    return YES;    



}

复制代码

 

（3）还有你也可以自定义其他视图控件加载到键盘上用来退出，比如在弹出的键盘上面加一个view来放置退出键盘的Done按钮。

  UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];  

  

      [topView setBarStyle:UIBarStyleBlack];  

  

      UIBarButtonItem * helloButton = [[UIBarButtonItem alloc]initWithTitle:@"Hello" style:UIBarButtonItemStyleBordered target:self action:nil];        

  

      UIBarButtonItem * btnSpace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];  

  

        

 

     UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];  

 

     NSArray * buttonsArray = [NSArray arrayWithObjects:helloButton,btnSpace,doneButton,nil];  

 

     [doneButton release];  

 

     [btnSpace release];  

 

     [helloButton release];  

 

     [topView setItems:buttonsArray];  

 

     [tvTextView setInputAccessoryView:topView];  

 

 -(IBAction)dismissKeyBoard  

 

 {  

 

     [tvTextView resignFirstResponder];  

 

 }