UITextView

1.创建并初始化
 @property (nonatomic, strong) UITextView *textView; 

//  创建
self.textView = [[UITextView  alloc] initWithFrame:self.view.frame]; 

//  设置textview里面的字体颜色  
 self.textView.textColor = [UIColor blackColor]; 
//  设置字体名字和字体大小  
 self.textView.font = [UIFont fontWithName:@"Arial" size:18.0]; 
//  设置代理
 self.textView.delegate = self;   
//  设置它的背景颜色
 self.textView.backgroundColor = [UIColor whiteColor]; 
 self.textView.text = @“hehe”; 
//  返回键的类型  
 self.textView.returnKeyType = UIReturnKeyDefault; 
//  键盘类型  
 self.textView.keyboardType = UIKeyboardTypeDefault; 

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



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 {    

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(getOverEditing)];    
         
}    
- (void)textViewDidEndEditing:(UITextView *)textView {    
   self.navigationItem.rightBarButtonItem = nil;  
} 
- (void)getOverEditing{
  [self.textView resignFirstResponder];   
}
（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;    
}

（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)];  
     UIBarButtonItem * cancelButton= [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];  
     NSArray * buttonsArray = @[cancelButton];  
     [topView setItems:buttonsArray];  
     [self.textView setInputAccessoryView:topView];  
 -(void)dismissKeyBoard  
 {  
     [tvTextView resignFirstResponder];  
 }

3.UITextView自定选择文字后的菜单

在ViewDidLoad中加入：

- (void)viewDidLoad
{
    [super viewDidLoad];
    self._textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 100, 300, 200)];
    [self.view addSubview:_textView];    
    UIMenuItem *menuItem = [[UIMenuItem alloc]initWithTitle:@“我是自定义的菜单" action:@selector(didClickCustomMenuAction)]; 
    UIMenuController *menu = [UIMenuController sharedMenuController]; 
    [menu setMenuItems:[NSArray arrayWithObject:menuItem]]; 
    [menuItem release]; 
}
当然上面那个@selector里面的changeColor方法还是自己写吧，也就是说点击了我们自定义的菜单项后会触发的方法。
然后还得在代码里加上一个方法：
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender 
{ 
    if(action ==@selector(changeColor) || action == @selector(copy:)) 
    { 
        if(_textView.selectedRange.length>0) 
            return YES; 
    } 
    return NO; 
} 
-(void)didClickCustomMenuAction
{
    NSLog(@"%@“,__function__);
}