UITextView 文本输入框详解手机开发

////别忘在 .h 中写代理  <UITextViewDelegate> 
  
///UILabel 显示的文本只读，无法编辑，可以根据文字个数自动换行； 
///UITextField 可编辑本文，但是无法换行，只能在一行显示；当点击键盘上的return时会收到一个事件做一些事情。 
////UITextView 可编辑文本，提供换行功能。 
  
UITextView* textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 10, 300, 100)]; 
    textView.backgroundColor = [UIColor grayColor]; 
    //文本 
    textView.text = @"aa"; 
    //字体 
    textView.font = [UIFont boldSystemFontOfSize:20.0]; 
    //对齐 
    textView.textAlignment = NSTextAlignmentCenter; 
    //字体颜色 
    textView.textColor = [UIColor redColor]; 
    //允许编辑 
    textView.editable = YES; 
    //用户交互     /////////////////////若想有滚动条 不能交互 上为No，下为Yes 
    textView.userInteractionEnabled = YES; /// 
    //自定义键盘 
    //textView.inputView = view; 
    //textView.inputAccessoryView = view; 
    textView.delegate = self; 
    [self.view addSubview:textView]; 
    //[textView release]; 
      
 //////////事件 
    - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ 
    //判断类型，如果是UITextView类型，收起键盘 
    for (UIView* view in self.view.subviews) { 
        if ([view isKindOfClass:[UITextView class]]) { 
            UITextView* tv = (UITextView*)view; 
            [tv resignFirstResponder]; 
        } 
    } 
} 
  
  
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{ 
    return YES; 
} 
- (BOOL)textViewShouldEndEditing:(UITextView *)textView{ 
    return YES; 
} 
  
- (void)textViewDidBeginEditing:(UITextView *)textView{ 
    NSLog(@"开始编辑"); 
} 
- (void)textViewDidEndEditing:(UITextView *)textView{ 
    NSLog(@"结束编辑"); 
} 
  
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{ 
  
    return YES; 
} 
- (void)textViewDidChange:(UITextView *)textView{ 
    NSLog(@"已经修改"); 
} 
  
- (void)textViewDidChangeSelection:(UITextView *)textView{ 
    NSLog(@"textViewDidChangeSelection"); 
}