IOS开发（15）之UITextView控件

本文主要是介绍IOS开发（15）之UITextView控件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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：

#import <UIKit/UIKit.h>@interface ZYViewController : UIViewController@property(nonatomic,strong) UITextView *myTextView;@end

ZYViewController.m：

@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:

#import <UIKit/UIKit.h>@interface ZYUITextViewViewController : UIViewController@property(nonatomic,strong) UITextView *myTextView;@end

ZYUITextViewViewController.m:

-(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：