小编典典

在 UITextField 的开头创建空间

all

我想在 UITextField 的开头留一点空间,就像这里一样: Add lefthand margin to
UITextField

但我不知道如何用 Swift 做到这一点。


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2022-07-16

共1个答案

小编典典

这就是我现在正在使用的:

斯威夫特 4.2

class TextField: UITextField {

    let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)

    override open func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.inset(by: padding)
    }

    override open func placeholderRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.inset(by: padding)
    }

    override open func editingRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.inset(by: padding)
    }
}

斯威夫特 4

class TextField: UITextField {

    let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)

    override open func textRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }

    override open func placeholderRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }

    override open func editingRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }
}

斯威夫特 3:

class TextField: UITextField {

    let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)

    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }

    override func placeholderRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }

    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, padding)
    }
}

我从来没有设置其他填充,但你可以调整。此类不处理文本字段上的 rightView 和 leftView。如果您希望正确处理它,您可以使用类似(objc
中的示例,我只需要 rightView:

- (CGRect)textRectForBounds:(CGRect)bounds {
    CGRect paddedRect = UIEdgeInsetsInsetRect(bounds, self.insets);

    if (self.rightViewMode == UITextFieldViewModeAlways || self.rightViewMode == UITextFieldViewModeUnlessEditing) {
        return [self adjustRectWithWidthRightView:paddedRect];
    }
    return paddedRect;
}

- (CGRect)placeholderRectForBounds:(CGRect)bounds {
    CGRect paddedRect = UIEdgeInsetsInsetRect(bounds, self.insets);

    if (self.rightViewMode == UITextFieldViewModeAlways || self.rightViewMode == UITextFieldViewModeUnlessEditing) {
        return [self adjustRectWithWidthRightView:paddedRect];
    }
    return paddedRect;
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    CGRect paddedRect = UIEdgeInsetsInsetRect(bounds, self.insets);

    if (self.rightViewMode == UITextFieldViewModeAlways || self.rightViewMode == UITextFieldViewModeWhileEditing) {
        return [self adjustRectWithWidthRightView:paddedRect];
    }
    return paddedRect;
}

- (CGRect)adjustRectWithWidthRightView:(CGRect)bounds {
    CGRect paddedRect = bounds;
    paddedRect.size.width -= CGRectGetWidth(self.rightView.frame);

    return paddedRect;
}
2022-07-16