在UITextField的开头创建空间 [英] Create space at the beginning of a UITextField

问题描述

我想在UITextField的开头留一点空间，就像这样：
UITextField对齐左边距

I want to leave a bit of space at the beginning of a UITextField, just like here: UITextField align left margin

但我不知道如何用Swift。

But I don't know how to do that with Swift.

推荐答案

这是我现在使用的：

class TextField: UITextField {

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

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

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

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

我从来没有设置其他填充，但你可以调整。这个类不会处理文本字段上的rightView和leftView。如果你想要正确处理你可以使用类似的东西（例如在objc和我只需要rightView：

I never set a other padding but you can tweak. This class doesn't take care of the rightView and leftView on the textfield. If you want that to be handle correctly you can use something like (example in objc and I only needed the 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;
}

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