IOS开发（15）之UITextView控件

1 前言
UITextView可以在一个滑动视图里面显示多行文本。

2 代码实例
ZYViewController.h：

[plain] #import <UIKit/UIKit.h>

@inte易做图ce ZYViewController : UIViewController

@property(nonatomic,strong) UITextView *myTextView;

@end

#import <UIKit/UIKit.h>

@inte易做图ce ZYViewController : UIViewController

@property(nonatomic,strong) UITextView *myTextView;

@end
ZYViewController.m：

[plain] @synthesize myTextView;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    myTextView = [[UITextView alloc] initWithFrame:self.view.bounds];//设置该文行文本框边框与整个手机视图相匹配
    myTextView.text = @"Some text here...";//内容
    myTextView.font = [UIFont systemFontOfSize:16.0f];//字体样式
    [self.view addSubview:myTextView];//添加视图
}

@synthesize myTextView;

- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    myTextView = [[UITextView alloc] initWithFrame:self.view.bounds];//设置该文行文本框边框与整个手机视图相匹配
    myTextView.text = @"Some text here...";//内容
    myTextView.font = [UIFont systemFontOfSize:16.0f];//字体样式
    [self.view addSubview:myTextView];//添加视图
}
ZYUITextViewViewController.h:

[plain] #import <UIKit/UIKit.h>

@inte易做图ce ZYUITextViewViewController : UIViewController

@property(nonatomic,strong) UITextView *myTextView;

@end

#import <UIKit/UIKit.h>

@inte易做图ce ZYUITextViewViewController : UIViewController

@property(nonatomic,strong) UITextView *myTextView;

@end
ZYUITextViewViewController.m:

[plain] (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];//通知中心键盘即将显示时候触发事件
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];//通知中心键盘即将消失时刻触发事件
    self.view.backgroundColor = [UIColor whiteColor];
    myTextView = [[UITextView alloc] initWithFrame:self.view.bounds];//设置该文行文本框边框与整个手机视图相匹配
    myTextView.text = @"handleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHide";//内容
    myTextView.font = [UIFont systemFontOfSize:16.0f];//字体样式
    [self.view addSubview:myTextView];//添加视图
}

-(void)handleKeyboardDidShow:(NSNotification *)paramNotifation{
    //paramNotifation userInfo 返回接受的用户信息字典。UIKeyboardFrameEndUserInfoKey 获得键盘结束时候的位置
    NSValue *keyboardRectAsObject = [[paramNotifation userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect;
    [keyboardRectAsObject getValue:&keyboardRect];//获取键盘控件大小
    myTextView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, keyboardRect.size.height, 0.0f);
}

-(void)handleKeyboardWillHide:(NSNotification *)paramNotification{
    self.myTextView.contentInset = UIEdgeInsetsZero;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [[NSNotificationCenter defaultCenter] removeObserver:self];//删除通知中心所有的信息
}

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];//通知中心键盘即将显示时候触发事件
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];//通知中心键盘即将消失时刻触发事件
    self.view.backgroundColor = [UIColor whiteColor];
    myTextView = [[UITextView alloc] initWithFrame:self.view.bounds];//设置该文行文本框边框与整个手机视图相匹配
    myTextView.text = @"handleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHidehandleKeyboardWillHide";//内容
    myTextView.font = [UIFont systemFontOfSize:16.0f];//字体样式
    [self.view addSubview:myTextView];//添加视图
}

-(void)handleKeyboardDidShow:(NSNotification *)paramNotifation{
    //paramNotifation userInfo 返回接受的用户信息字典。UIKeyboardFrameEndUserInfoKey 获得键盘结束时候的位置
    NSValue *keyboardRectAsObject = [[paramNotifation userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect;
    [keyboardRectAsObject getValue:&keyboardRect];//获取键盘控件大小
    myTextView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, keyboardRect.size.height, 0.0f);
}

-(void)handleKeyboardWillHide:(NSNotification *)paramNotification{
self.myTextView.contentInset = UIEdgeInsetsZero;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}

-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self];//删除通知中心所有的信息
}
运行结果：

补充：移动开发 , IOS ,