iOS UI-文本视图（UITextView）

 #import "ViewController.h"

 @interface ViewController ()<UITextViewDelegate>

 @property (strong, nonatomic) UITextView *textView;

 @end

 @implementation ViewController

 @synthesize textView;

 - (void)viewDidLoad {
     [super viewDidLoad];
     //创建视图
     UIView *bgView = [[UIView alloc] initWithFrame:self.view.frame];
     bgView.backgroundColor = [UIColor lightGrayColor];
     [self.view addSubview:bgView];
     //创建点击手势
     UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeKeyBoard)];
     [bgView addGestureRecognizer:tap];

     //初始化大小
     self.textView = [[UITextView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width-, )];
     //字体颜色
     self.textView.textColor = [UIColor blackColor];
     //字体名称和大小
     self.textView.font = [UIFont fontWithName:@"Arial" size:18.0];
     //设置委托方法
     self.textView.delegate = self;
     //背景颜色
     self.textView.backgroundColor = [UIColor whiteColor];
     //内容
     //self.textView.text = @"qwertyuyiopasdfghjklzxcvbnm";
     //返回键类型
     self.textView.returnKeyType = UIReturnKeyDefault;
     //键盘类型
     self.textView.keyboardType = UIKeyboardTypeNamePhonePad;
     //是否可以拖动
     self.textView.scrollEnabled = YES;
     //禁止编辑
     self.textView.editable = YES;
     //自适应高度
     self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
     //加到整个页面中
     [self.view addSubview:self.textView];
 }

 - (void)closeKeyBoard
 {
     [self.textView resignFirstResponder];
 }
 - (void)textViewDidBeginEditing:(UITextView *)textView
 {
     [UIView beginAnimations:@"test" context:nil];
     [UIView setAnimationDuration:0.3];

     CGRect rect = self.textView.frame;
     rect.origin.y = rect.origin.y - ;
     self.textView.frame = rect;
     [UIView commitAnimations];
 }

 - (void)textViewDidEndEditing:(UITextView *)textView
 {
     [UIView beginAnimations:@"test" context:nil];
     [UIView setAnimationDuration:0.3];

     CGRect rect = self.textView.frame;
     rect.origin.y = rect.origin.y + ;
     self.textView.frame = rect;
     [UIView commitAnimations];
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 @end