Objective c 如何访问在Objective C中使用for循环动态创建的textField值？

我已经使用目标C中的for循环创建了4个

UITextField

。现在我想验证这些文本。这些文本字段是否为空

 for(int i=0;i<4; i++){

            UITextField   *textField = [[UITextField alloc] initWithFrame:CGRectMake(x, y, 211, 39)];
            UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 20)];
            [textField setTag:i];
            textField.leftView = paddingView;
            textField.leftViewMode = UITextFieldViewModeAlways;
            textField.backgroundColor = [UIColor colorWithRed:237.0/255.0 green:237.0/255.0 blue:237.0/255.0 alpha:1.0];
            textField.font = [UIFont systemFontOfSize:15];
            textField.placeholder = [placeholder objectAtIndex:i];
            textField.autocorrectionType = UITextAutocorrectionTypeNo;
            textField.keyboardType = UIKeyboardTypeDefault;
            textField.returnKeyType = UIReturnKeyDone;
            textField.clearButtonMode = UITextFieldViewModeWhileEditing;
            textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
            if(i>=2){
                [textField setSecureTextEntry:YES];
            }
             [self.view addSubview:textField];
            y=y+69;
}

for（int i=0；i=2）{
[文本字段设置安全扩展：是]；
}
[self.view addSubview:textField]；
y=y+69；
}

您可以使用标记值检索如下文本字段

UITextField *txtField1 = [self.view viewWithTag:0];
UITextField *txtField2 = [self.view viewWithTag:1];
UITextField *txtField3 = [self.view viewWithTag:2];
UITextField *txtField4 = [self.view viewWithTag:3];
UITextField *txtField5 = [self.view viewWithTag:4];

if(txtField1.text.length > 0)
{

}

您可以对其他文本字段应用相同的检查

注:

---

确保具有唯一的标记值，而不是0,1,2,3,4,5

如果要检查

UITextField

是否为空，请定义一个

宏来修剪空白

#define TRIM(string) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]

在按钮操作方法中

UITextField *textField1 = [self.view viewWithTag:0];
UITextField *textField2 = [self.view viewWithTag:1];
UITextField *textField3 = [self.view viewWithTag:2];
UITextField *textField4 = [self.view viewWithTag:3];

if(![TRIM(textField1.text) length])
{
   // Your textfield is empty 
}
//Similarly check for other textfields

for（int i=0；i
for(int i=0;i<4; i++) {
    UITextField   *textField = [self.view viewWithTag:i];
    if (textField.hasText) {
        //If this returns true then text field has text otherwise not
    }
}