相关疑难解决方法(0)

我们可以将UITextField的这个属性设置为"Send","Search","Go"等:

@property(nonatomic) UIReturnKeyType returnKeyType

但是在使用UITextField时设置它根本不会改变.

我想要这种行为:当UITextField为空时,让returnKeyType为"Return",否则让returnKeyType为"Send".

我有4个uitextfields,可以识别它们是空的还是完整的.如果完成,则将其返回键类型更改为GO,否则为默认值.问题是键盘没有改变键类型,即使我使用reloadinputview

- (void)viewDidLoad
{
    [super viewDidLoad];

    _fieldsArray = @[_nameField, _passwordField, _emailField, _usernameField];
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{

    NSRange textFieldRange = NSMakeRange(0, [textField.text length]);

    //NSLog(@"%d", !(NSEqualRanges(range, textFieldRange) && [string length] == 0));

    [self signUpFieldsAreValid:(!(NSEqualRanges(range, textFieldRange) && [string length] == 0) && [self validateSignUpFields:textField])];
    [textField reloadInputViews];
    return YES;
}
- (BOOL)textFieldShouldClear:(UITextField *)textField{

    [self signUpFieldsAreValid:NO];
    [textField reloadInputViews];
    return YES;
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    for (UITextField *aTextField in _fieldsArray) {
        if (aTextField.isFirstResponder) {

            aTextField.layer.borderWidth = 0.f;
            aTextField.layer.borderColor = nil;

        } …