如何檢查UITextView何時被編輯？

Question

我使用下面的代碼，但是當我開始編輯的UITextView不被認可：

-(void)textViewDidBeginEditing:(UITextView *)textView{ 

[done setHidden:NO]; 

NSLog(@"Started editing target!"); 

} 

這是爲什麼？

我也將代理添加到.h文件。

Answer 1

嘗試設置您的UITextView的委託。您需要將出口連接到代表在Interface Builder，或者如果您以編程方式創建它，您可以：

yourTextView.delegate = self; 

設置委託你插入你的元素控制器。

Answer 2

確保您：

1. nameOfTextView .delegate =自我;
2. 顯示你在你的類使用UITextViewDelegate編譯

Answer 3

也可能是「咄」的答案，但如果你在IB創建你的TextView，你記得連接插座嗎？

Answer 4

if ([self.textView isFirstResponder]) ... 

更新：我包括完整的源代碼來表示的UITextView肯定響應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 

Answer 5

1. Firstly you have to set UIViewController <UITextViewDelegate>

2. Set

   yourTextview.delegate = self;

3. And catch this delegate using

   -(void)textViewDidBeginEditing:(UITextView *)textView { [self.yourTextview setText:@""]; [yourTextview setTextColor:[UIColor blackColor]]; }