UITextField鍵盤不能輸入任何東西

Question

加載一個xib文件作爲UIView，並且我得到了一個UITextField形式的Xib文件（它只是一個包含文本框和按鈕的視圖）。 但是當應用程序啓動並且textfield出現時。我無法在此UITextField上輸入任何字母。 但粘貼文本到該UITextField是好的。爲什麼？ 這是我加入的代碼

-(IBAction)showSheet{  
    UIView *myView = [[[NSBundle mainBundle] loadNibNamed:@"LoginViewComp" owner:self options:NULL] lastObject];  
    [myView setFrame:CGRectMake(0, 44, 320, 400)]; 

    UIButton *btn1 = (UIButton *)[myView viewWithTag:101]; 
    UITextField *field = (UITextField *)[myView viewWithTag:102]; 
    UILabel *lbl = (UILabel *)[myView viewWithTag:103];  

    [field setEnabled:YES]; 

    [btn1 addTarget:self action:@selector(testBtn1) forControlEvents:UIControlEventTouchUpInside]; 

    DTActionSheet *sheet = [[DTActionSheet alloc] initWithContentView:myView sheetTitle:@"Demo"]; 
    [sheet showInView:self.view]; 
    [sheet setUserInteractionEnabled:YES]; 
} 

-(void)testBtn1{ 
    NSLog(@"btn1 touch up inside");  
} 
@end 

DTActionSheet.m

@interface DTActionSheet() 
@property (nonatomic,strong) UIView* contentView; 
@property (nonatomic,strong) UIToolbar* toolBar; 
@end 

@implementation DTActionSheet 
@synthesize contentView=_contentView; 
@synthesize toolBar=_toolBar; 

-(id)initWithContentView:(UIView*)contentView sheetTitle:(NSString*)title; 
{ 
    self = [super init]; 
    if (self) 
    { 
     _contentView = contentView; 
     int btnnum = (contentView.frame.size.height-5)/50; // (height+44-20-25)/50 
     for(int i=0; i<btnnum; i++) 
     { 
      [self addButtonWithTitle:@" "]; 
     } 
     _toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)]; 
     _toolBar.barStyle = UIBarStyleBlackOpaque; 

     UIBarButtonItem *titleButton = [[UIBarButtonItem alloc] initWithTitle:title 
                     style:UIBarButtonItemStylePlain 
                     target:nil 
                     action:nil]; 

     UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" 
                     style:UIBarButtonItemStyleDone 
                     target:self 
                     action:@selector(done)]; 

     UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" 
                     style:UIBarButtonItemStyleBordered 
                     target:self 
                     action:@selector(cancel)]; 

     UIBarButtonItem *fixedButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace 
                         target:nil 
                         action:nil]; 

     [_toolBar setItems: [NSArray arrayWithObjects:leftButton,fixedButton,titleButton,fixedButton,rightButton,nil]]; 

     [self addSubview:_toolBar]; 
     [self addSubview:_contentView]; 
    } 
    return self; 
} 

-(void)done 
{ 
    [self dismissWithClickedButtonIndex:0 animated:YES]; 
} 
-(void)cancel 
{ 
    [self dismissWithClickedButtonIndex:0 animated:YES]; 
} 
@end 

嘿，夥計們，有什麼想法？

Answer 1

嘗試使用UIKeyInput協議參考輸入 - http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIKeyInput_Protocol/Reference/Reference.html

確保使用其委託..