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(50, 150, self.view.frame.size.width-100, 300)];
    //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 - 80;
    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 + 80;
    self.textView.frame = rect;
    [UIView commitAnimations];
}

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

@end