在我看來我有幾個UITextFields,我需要顯示一些鍵文字輸入和其他時間UIDatePicker。幾個UITextField,需要切換鍵盤和UIDatePicker
我爲了顯示一個DatePicker我爲日期UITextField實現了委託,但是一旦我爲文本輸入選擇另一個UITextField,DatePicker仍然保留在後臺。然後我試圖實現委託也爲其他的UITextField,使用此代碼:
- (void)viewDidLoad {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"dd/MM/yyyy"];
NSString *stringFromDate = [formatter stringFromDate:[NSDate date]];
NSLog(@"IN - AddExpenseViewController::viewDidLoad %s",stringFromDate);
date.text = stringFromDate;
datePicker.hidden = YES;
date.delegate = self;
amount.delegate = self;
isIncome = NO;
[super viewDidLoad]; }
// ...
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
NSLog(@"IN - AddExpenseViewController::textFieldShouldBeginEditing %@",textField.placeholder);
if (![textField.placeholder isEqual:[NSString stringWithFormat:@"Date"]]) {
[self hideDatePicker];
[textField becomeFirstResponder];
return YES;
}
else {
[self showDatePicker];
}
return NO;}
的問題是,當我選擇日期TextField和比量,委託被調用的循環:
2010-12-05 13:15:17.324 AddExpense [1179:207] IN - AddExpenseViewController :: textFieldShouldBeginEditing金額 2010-12-05 13:15:17.324 AddExpense [1179:207 ] IN - AddExpenseViewController :: hideDatePicker 2010-12-05 13:15:17.325 AddExpense [1179:207] IN - AddExpenseViewController :: textFieldShouldBeginEditing Amount 2010-12-05 13:15:17.326 AddExpense [1179:207] IN - AddExpenseViewController :: hideDatePicker 2010- 12-05 13:15:17.327 AddExpense [1179:207] IN - AddExpenseViewController :: textFieldShouldBeginEditing金額 2010-12-05 13:15:17.327 AddExpense [1179:207] IN - AddExpenseViewController :: hideDatePicker
和有是沒有辦法阻止它! 我的代碼有什麼問題?
由於提前,AM
嗨,我知道textFieldShouldBeginEditing:每次發送,但我不明白爲什麼它循環這個方法!我希望看到它只被稱爲一次,不要讓我的程序被鎖定... – wheisenberg 2010-12-05 13:10:56