UITextView

来源：互联网发布：linux 查cpu核数编辑：程序博客网时间：2024/06/13 07:40
- (void)viewDidLoad {    [super viewDidLoad];    self.view.backgroundColor = [UIColor whiteColor];       self.textView = [[UITextView alloc]initWithFrame:CGRectMake(0, 667-80, 375, 80)];       self.textView.delegate = self;       self.textView.font = [UIFont systemFontOfSize:20];       self.textView.textColor = [UIColor blackColor];       self.textView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);//添加滚动区域    self.textView.text = @"习大大";       self.textView.scrollEnabled = YES;//是否可滚动    self.textView.editable = YES;//是否可编辑       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.textView.layer.cornerRadius = 8; //边框设置为圆角       self.textView.layer.borderWidth = 1;   //    设置边框颜色 参数2是一个数组 分别为三基色和alpha分量；    CGFloat color[]={0.5, 0.5, 0.5, 1};    self.textView.layer.borderColor = CGColorCreate(CGColorSpaceCreateDeviceRGB(),color);    self.textView.layer.masksToBounds = YES;   //    [self.textView becomeFirstResponder];//获得焦点 程序运行就获取光标    self.myView = [[UIView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];    self.myView.tag = 1000;       [self.view addSubview:self.myView];       [self.myView addSubview:self.textView];       //注册通知,监听键盘弹出事件    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];       //注册通知,监听键盘消失事件    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHidden) name:UIKeyboardDidHideNotification object:nil];}//将要开始编辑- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{       return YES;}//将要结束编辑- (BOOL)textViewShouldEndEditing:(UITextView *)textView{       return YES;}//开始编辑- (void)textViewDidBeginEditing:(UITextView *)textView{   }//结束编辑- (void)textViewDidEndEditing:(UITextView *)textView{   }//焦点发生改变- (void)textViewDidChangeSelection:(UITextView *)textView{   }//内容发生改变编辑- (void)textViewDidChange:(UITextView *)textView{}//内容将要发生改变编辑//控制输入文字的长度和内容，可通调用以下代理方法实现- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{       if (range.location>=100){        //控制输入文本的长度        return  NO;    }    if ([text isEqualToString:@"\n"]) {        //禁止输入换行        return NO;    }    else{        return YES;    }}// 键盘弹出时-(void)keyboardDidShow:(NSNotification *)notification{       //获取键盘高度    NSValue *keyboardObject = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];       CGRect keyboardRect;       [keyboardObject getValue:&keyboardRect];       //调整放置有textView的view的位置       //设置动画    [UIView beginAnimations:nil context:nil];       //定义动画时间    [UIView setAnimationDuration:kAnimationDuration];       //设置view的frame，往上平移    [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, self.view.frame.size.height-keyboardRect.size.height-kViewHeight, 375, kViewHeight)];       [UIView commitAnimations];}//键盘消失时-(void)keyboardDidHidden{    //定义动画    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:kAnimationDuration];    //设置view的frame，往下平移    [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, self.view.frame.size.height-kViewHeight, 375, kViewHeight)];    [UIView commitAnimations];}-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{       [self.textView resignFirstResponder];}@end
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