iOS - 文本视图

• 

  文本视图的使用

  文本视图用于显示多行可滚动文本，可选择性编辑。
• 

  重要属性

  • dataDetectorTypes
  • delegate
  • editable
  • inputAccessoryView
  • inputView
  • text
  • textMoognment
  • textColor
• 

  重要的委托方法

  
  -(void)textViewDidBeginEditing:(UITextView *)textView
  -(void)textViewDidEndEditing:(UITextView *)textView
  -(void)textViewDidChange:(UITextView *)textView
  -(BOOL)textViewShouldEndEditing:(UITextView *)textView
  

  复制
• 

  添加自定义方法 addTextView

  
  -(void)addTextView {
     myTextView = [[UITextView alloc]initWithFrame:
     CGRectMake(10, 50, 300, 200)];
     [myTextView setText:@"Lorem ipsum dolor sit er elit lamet, consectetaur
     cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et 
     dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation 
     ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
     dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat 
     nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in 
     culpa qui officia deserunt mollit anim id est laborum. Nam liber te 
     conscient to factor tum poen legum odioque civiuda.
     Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing
     pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aiqua. 
     Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi 
     aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit 
     in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
     Excepteur sint occaecat cupidatat non proident, sunt in culpa
     qui officia deserunt mollit anim id est laborum. Nam liber te conscient
     to factor tum poen legum odioque civiuda."];
     myTextView.delegate = self;
     [self.view addSubview:myTextView];
  }
  

  复制
• 

  在 ViewController.m 中实现 textView Delegates

  
  #pragma mark - Text View delegates
  -(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:
     (NSRange)range replacementText:(NSString *)text {
     
     if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
     }
     return YES;
  }
  -(void)textViewDidBeginEditing:(UITextView *)textView {
     NSLog(@"Did begin editing");
  }
  -(void)textViewDidChange:(UITextView *)textView {
     NSLog(@"Did Change");
  }
  -(void)textViewDidEndEditing:(UITextView *)textView {
     NSLog(@"Did End editing");
  }
  -(BOOL)textViewShouldEndEditing:(UITextView *)textView {
     [textView resignFirstResponder];
     return YES;
  }
  

  复制
• 

  更新 ViewController.m 中的 viewDidLoad 如下

  
  (void)viewDidLoad {
     [super viewDidLoad];
     [self addTextView];
  }
  

  复制
• 

  输出

  当我们运行应用程序时，我们将获得以下输出 -