Question

我的问题是没有调用UITextView的委托方法。

我的代码，我没有包括整个班级，只包括相关部分。我没有使用XIB，它全部以编程方式添加。我的委托方法都没有被调用。

·H

@interface ChatAppViewController : UIViewController <UITableViewDelegate, 
UITableViewDataSource, UITextViewDelegate>
{
UITextView  * messageTextField;
}

的.m

- (void)viewDidLoad 
{
    messageTextField = [[UITextField alloc] initWithFrame:CGRectMake(5, 408, 310, 70)];
messageTextField.textColor = [UIColor blackColor]; //text color
messageTextField.font = [UIFont systemFontOfSize:17.0];  //font size
[messageTextField setPlaceholder:@"Post a message" ];
messageTextField.backgroundColor = [UIColor whiteColor]; //background color
messageTextField.autocorrectionType = UITextAutocorrectionTypeNo;
messageTextField.keyboardType = UIKeyboardTypeDefault;  // type of the keyboard
messageTextField.returnKeyType = UIReturnKeyDone;  // type of the return key
messageTextField.delegate = self;   
messageTextField.hidden = NO;
[self.view addSubview:messageTextField];
}

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView {
NSLog(@"textViewShouldBeginEditing");
return YES;
}
- (void)textViewDidBeginEditing:(UITextView *)textView {
NSLog(@"textViewDidBeginEditing");
}
- (void)textViewDidChange:(UITextView *)textView {
NSLog(@"textViewDidChange");
}
- (void)textViewDidChangeSelection:(UITextView *)textView {
NSLog(@"textViewDidChangeSelection");
}
- (BOOL)textViewShouldEndEditing:(UITextView *)textView {
NSLog(@"textViewShouldEndEditing");
return YES;
}
- (void)textViewDidEndEditing:(UITextView *)textView {
NSLog(@"textViewDidEndEditing");
}

非常感谢， -code

Answer 1

这一行：

messageTextField = [[UITextField alloc] initWithFrame:...

创建UITextField，而不是UITextView。

Answer 2

简单。您创建了一个UITextField对象。这就是没有调用任何委托方法的原因 - 因为它们是错误的。用以下内容替换viewDidLoad：

- (void)viewDidLoad 
{
    messageTextField = [[UITextView alloc] initWithFrame:CGRectMake(5, 408, 310, 70)];
    messageTextField.textColor = [UIColor blackColor]; //text color
    messageTextField.font = [UIFont systemFontOfSize:17.0];  //font size
    messageTextField.backgroundColor = [UIColor whiteColor]; //background color
    messageTextField.autocorrectionType = UITextAutocorrectionTypeNo;
    messageTextField.keyboardType = UIKeyboardTypeDefault;  // type of the keyboard
    messageTextField.returnKeyType = UIReturnKeyDone;  // type of the return key
    messageTextField.delegate = self;   
    messageTextField.hidden = NO;
    [self.view addSubview:messageTextField];
}

编译它，现在委托函数应该正常启动。

Answer 3

如果您在UITextField中创建.xib，则在.h中声明为IBOutlet ...并将文本字段的委托连接到文件所有者，否则一切都应该是完美的。< / p>

我的UITextView没有调用任何委托方法

3 个答案: