我正在使用 UITEXTVIEW 。我按下完成按钮时尝试发送resignFirstResponder。我不知道如何触发包含resignFirstResponder行的方法。
我已将UITextView的委托设置为Interface Builder中的文件所有者。这是我的viewcontroller的头文件和实现文件:
#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];
}
答案 0 :(得分:2)
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,如果你这样做,你将无法输入实际的回车。
答案 1 :(得分:1)
查看源代码后,我发布的链接毫无意义。我以为你在谈论键盘上的完成键。但是现在我看到你在导航栏上讨论了一个实例UIButton
,对吧?
到目前为止,您的addButton:isLast:
方法看起来很棒,但我会稍微更改一下,以便它遵守Apple HIG:
- (void)addButton:(id)delegate isLast:(BOOL)last
{
UIBarButtonItem *anotherButton;
anotherButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:delegate
action:@selector(finishQuestionnaire:)];
self.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];
}
它几乎相同,除了这个创建一个具有适当风格的按钮。
无论如何,我没有看到如何添加按钮,因为addButton:isLast:
中没有调用viewDidLoad:
。在viewDidLoad:
。
[self addButton:self isLast:NO];
last
在addButton:isLast:
中是多余的,因为它甚至没有使用,所以我只是传递任何内容(NO
)。
你差不多完成了,但如果你按下那个按钮,你的应用程序就会崩溃,因为finishQuestionnaire:
(self
)上没有实现CommentQuestionViewController
。而且,由于您想在用户按下完成按钮时关闭键盘,我们也会将您的文本视图作为第一响应者进行重新调整。只需添加以下方法:
- (void)finishQuestionnaire:(id)sender
{
[inputAnswer resignFirstResponder];
}
答案 2 :(得分:1)
它的BOOL是它的......
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
如果这不起作用,请检查以下事项..
2.检查textView委托是否写在.h文件中。
@interface YourViewController : UIViewController <UITextViewDelegate>
3.检查是否已分配textView的代理。
//set this in the viewDidLoad method
self.textView.delegate = self;
答案 3 :(得分:0)
通过此方法检查新行字符。
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
然后检查文本的长度,如果是一个字符长度,则输入新行字符,而不是粘贴。
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
BOOL hasNewLineCharacterTyped = (text.length == 1) && [text rangeOfCharacterFromSet:[NSCharacterSet newlineCharacterSet]].location != NSNotFound;
if (hasNewLineCharacterTyped) {
[textView resignFirstResponder];
return NO;
}
return YES;
}