2.textField.delagate = self;
- (void)viewDidLoad
{
[super viewDidLoad];
//初始化一個textField並設置他的大小
UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(100, 100, 120, 30)];
//邊框樣式
textField.borderStyle = UITextBorderStyleBezel;
//背景顏色
textField.backgroundColor = [UIColor orangeColor];
//設置背景
textField.background = [UIImage imageNamed:@"1.jpg"];
//再次編輯就清空
textField.clearsOnBeginEditing = YES;
//刪除按鈕
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
//文字自適應
textField.adjustsFontSizeToFitWidth = YES;
//設置鍵盤樣式
//textField.keyboardType = UIKeyboardTypeNumberPad;
//密碼輸入
//textField.secureTextEntry = YES;
//return按鈕樣式
textField.returnKeyType = UIReturnKeyDone;
textField.delegate = self;
[self.view addSubview:textField];
}
//限制文本輸入的長度
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([textField.text length] >= 6) {
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"Error" message:@"密碼爲6位" delegate:self cancelButtonTitle:nil otherButtonTitles:@"確定", nil];
[alertView show];
}else{
return YES;
}
return YES;
}
//按下return建時隱藏鍵盤
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];//失去焦點
return YES;
//called when 'return' key pressed. return NO to ignore.
}