iphone - 辞职第一响应者 UITextView

Question

我正在使用UITEXTVIEW。我试图在按下完成按钮时发送一个 resignFirstResponder 。我不确定如何触发包含 resignFirstResponder 行的方法。

我已将 UITextView 的委托(delegate)设置为 Interface Builder 中的文件所有者。这是我的 View Controller 的 header 和实现文件:

#import <Foundation/Foundation.h>
#import "Question.h"

@interface CommentQuestionViewController : UIViewController {
    Question *question;
    IBOutlet UILabel *questionTitle;
    IBOutlet UITextView *inputAnswer; //this is the textview
}

@property (nonatomic, retain) UILabel *questionTitle;
@property (nonatomic, retain) Question *question;
@property (nonatomic, retain) UITextView *inputAnswer;

- (void) addButton:(id)sender isLast:(BOOL)last;
- (void) setQuestionId:(NSString*)quId withTitle:(NSString*)quTitle number:(NSString*)quNum section:(NSString*)sId questionType:(NSString*)qt;

@end


#import "CommentQuestionViewController.h"


@implementation CommentQuestionViewController

@synthesize questionTitle, question, inputAnswer;

- (void) addButton:(id)delegate isLast:(BOOL)last{
    UIBarButtonItem *anotherButton;
    anotherButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:delegate action:@selector(finishQuestionnaire:)];     
    self.navigationItem.rightBarButtonItem = anotherButton;
    [anotherButton release];
}

-(void)viewDidLoad{  
    //self.questionTitle.text = question.qTitle;
    [[self questionTitle] setText:[question qTitle]];
    [super viewDidLoad];
    NSString *str = [NSString stringWithFormat:@"Question %@", [question qNumber]];
    //self.title = str;
    [self setTitle:str];
    [str release];
}

-(void) setQuestionId:(NSString*)quId withTitle:(NSString*)quTitle number:(NSString*)quNum section:(NSString*)sId questionType:(NSString*)qt{   
    question = [[Question alloc]init];
    [question setQId:quId];
    [question setQTitle:quTitle];
    [question setQNumber:quNum];
    [question setSectionId:sId];
    [question setQType:qt];
}

- (void) viewWillAppear:(BOOL)animated{
    self.navigationItem.hidesBackButton = YES;
}


- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void) textViewDidEndEditing:(UITextView*)textView{
    [textView resignFirstResponder];
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)dealloc {
    [inputAnswer release];
    [questionTitle release];
    [question release];
    [super dealloc];
}

Answer 1

你可以试试这个:

–(BOOL)textView:(UITextView*)textView shouldChangeCharactersInRange:(NSRange)range replacementText:(NSString*)text {
    if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
        return NO;
    }
    else
        return YES;
}

当然，如果这样做，您将无法键入实际的回车符。