IOS - Visualização de Texto

Uso de Text View

A Visualização de Texto é usada para exibir texto rolável de várias linhas, que é opcionalmente editável.

Propriedades importantes

dataDetectorTypes
delegate
editable
inputAccessoryView
inputView
text
textAlignment
textColor

Delegar MÉTODOS importantes

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

Adicionar um método personalizado 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];
}

Delegados para implementar o textView ViewController.m

#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;
}

Em ViewController.m, atualize viewDidLoad da seguinte forma

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

resultado

Quando executarmos o aplicativo, obteremos a seguinte saída -

↰ Previous page