xcode 如何检查 UITextView 何时被编辑？
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How can I check when a UITextView is being edited?
提问by pixelbitlabs
I'm using the following code but it is not being recognised when I start editing the UITextView:
我正在使用以下代码，但在我开始编辑 UITextView 时无法识别它：
-(void)textViewDidBeginEditing:(UITextView *)textView{
[done setHidden:NO];
NSLog(@"Started editing target!");
}
Why is this?
为什么是这样？
I have added the delegate to the .h file too.
我也将委托添加到 .h 文件中。
回答by Matteo Alessani
Try to set the delegate of your UITextView. You need to connect the outlet to the delegate in Interface Builder or if you are creating it programmatically you can:
尝试设置 UITextView 的委托。您需要将插座连接到 Interface Builder 中的委托，或者如果您以编程方式创建它，您可以：
yourTextView.delegate = self;
to set the delegate to the controller you are inserting your element.
将委托设置为您要插入元素的控制器。
回答by ohho
if ([self.textView isFirstResponder]) ...
UPDATE: I include the full source to indicate UITextView definitely responds to isFirstResponder @d2burke
更新：我包含完整的源代码以表明 UITextView 肯定响应 isFirstResponder @d2burke
#import "TextViewController.h"
@interface TextViewController ()
@property (nonatomic, retain) IBOutlet UITextView *textView;
@end
@implementation TextViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)click:(UIButton *)check
{
BOOL isActive = [self.textView isFirstResponder];
NSLog(@"%d", isActive);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
回答by badeleux
make sure that you:
确保您：
- nameOfTextView.delegate = self;
- show compiler you are using UITextViewDelegate in your class
- nameOfTextView.delegate = self;
- 显示您在类中使用 UITextViewDelegate 的编译器
回答by Nagarjun
Firstly you have to set UIViewController <UITextViewDelegate>SetyourTextview.delegate = self;And catch this delegate using-(void)textViewDidBeginEditing:(UITextView *)textView { [self.yourTextview setText:@""]; [yourTextview setTextColor:[UIColor blackColor]]; }
Firstly you have to set UIViewController <UITextViewDelegate>SetyourTextview.delegate = self;And catch this delegate using-(void)textViewDidBeginEditing:(UITextView *)textView { [self.yourTextview setText:@""]; [yourTextview setTextColor:[UIColor blackColor]]; }
回答by Bill Burgess
Also could be a "duh" answer, but if you created your textView in IB, did you remember to connect the outlet up?
也可能是“废话”的答案，但是如果您在 IB 中创建了 textView，您是否记得将插座连接起来？
