UITableView

#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 tocome to serve their country.

Now is the time for all good developers to cometo 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

2. UITextView退出键盘的几种方式

因为你点击UITextView会出现键盘，如果你退出键盘，有如下几种方式：

（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UITextViewDelegate。代码如下：

- (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];

}

（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。代码如下：

#pragma mark - UITextView Delegate Methods

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

{

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

        [textView resignFirstResponder];

        return NO;

    }

    return YES;

}

这样无论你是使用电脑键盘上的回车键还是使用弹出键盘里的return键都可以达到退出键盘的效果。

（3）还有你也可以自定义其他加载键盘上面用来退出，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。

代码如下：

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];

}

（4）设置UITextView圆角问题

做法是在 #import QuartzCore/QuartzCore.h 后，便能調用[textView.layer setCornerRadius:10]; 來把 UITextView 设定圓角

（5）UITextView根据文本大小自适应高度

通过实现文本字数来确定高度，如下：

NSString * desc = @"Description it is  a test font, and don't become angry for which i use to do here.Now here is a very nice party from american or not!";

CGSize  size = [desc sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(240, 2000) lineBreakMode:UILineBreakModeWordWrap];

只有UILabel需要定义的numberoflines为0，即不做行数的限制。如下：

[label  setNumberOfLines:0];
[label  setFrame:CGRectMake(40, 135, 240, size.height+10)];
[label setText:desc];

（6）UITextView自定选择文字后的菜单

在ViewDidLoad中加入：

UIMenuItem *menuItem = [[UIMenuItem alloc]initWithTitle:@"分享到新浪微博" action:@selector(changeColor:)];
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:))
{
if(textView.selectedRange.length>0)
return YES;
}
return NO;
}