如果用户双击我的uitextview,我只想让它可编辑。
但在我的代码中,它只起作用一次。隐藏键盘后,双击停止像我想的那样工作。它只显示"复制并定义"弹出窗口,如果我再试一次。。。
也许"textViewDidEndEditing"不是正确的方式。。。
这是代码:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
CGFloat screen_height = [UIScreen mainScreen].bounds.size.height;
CGFloat screen_width = [UIScreen mainScreen].bounds.size.width;
scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0,0,screen_width,screen_height)];
scrollView.showsVerticalScrollIndicator=NO;
scrollView.scrollEnabled=NO;
scrollView.userInteractionEnabled=YES;
[scrollView setBackgroundColor:[UIColor colorWithRed: 0.0 green: 0.0 blue: 0.0 alpha: 0.5]];
[self.view addSubview:scrollView];
scrollView.contentSize = CGSizeMake(screen_width,screen_height);
MyTextView = [[UITextView alloc]initWithFrame:CGRectMake(0, 0, screen_width, screen_height)];
MyTextView.text = @"HeadlinenNo1";
MyTextView.textColor = [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0];
[MyTextView setFont:[UIFont fontWithName:@"Helvetica" size:90]];
MyTextView.textAlignment = NSTextAlignmentCenter;
MyTextView.delegate = self;
[MyTextView setScrollEnabled:NO];
[MyTextView setEditable:NO];
[MyTextView setUserInteractionEnabled:YES];
[MyTextView setBackgroundColor:[UIColor colorWithRed: 0.0 green: 0.0 blue: 0.0 alpha: 0.0]];
[MyTextView sizeToFit];
[scrollView addSubview:MyTextView];
// TAP
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap:)];
[doubleTap setNumberOfTapsRequired:2];
[doubleTap setNumberOfTouchesRequired:1];
[MyTextView addGestureRecognizer:doubleTap];
// KEYBOARD
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
-(void)doubleTap:(UITapGestureRecognizer *)sender {
NSLog(@"View: %@", [[sender view] class]);
UITextView *tappedView = (UITextView *)[sender view];
[tappedView setEditable:YES];
[tappedView becomeFirstResponder];
}
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
if (((UITapGestureRecognizer *)gestureRecognizer).numberOfTapsRequired == 2) {
return YES;
}
}
return YES;
}
-(BOOL)canBecomeFirstResponder {
if (MyTextView.editable == YES) {
return YES;
}
else {
return NO;
}
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGesture {
return YES;
}
-(void)textViewDidEndEditing:(UITextView *)textView {
[textView setEditable:NO];
}
-(void)keyboardDidHide:(NSNotification *)aNotification {
NSLog(@"keyboardDidHide");
// [textView setEditable:NO]; // same result like textViewDidEndEditing
}
从方法中删除/注释[textView setEditable:NO];
CCD_ 2。
这是唯一一个给你带来麻烦的想法。因为停止UITextView/UItextField编辑模式的最佳方法是resignFirstReponder
方法调用。
编辑
对于隐藏键盘,在viewDidLoad
方法中添加以下行
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
[self.view addGestureRecognizer:singleTap];
然后按照添加hideKeyboard
-(void) hideKeyboard
{
[MyTextView resignFirstResponder];
}
如果在文本视图上方添加清晰视图,并在清晰视图上添加双击手势,事情就会很简单。当识别出双击时,删除清晰视图并使文本视图成为第一响应
[clearView removeFromSuperview] ;
[textview becomeFirstResponder] ;