UIButton中带有图像的标题

Question

I have set an image in a UIButton but I need to set the title above this image. How can I do this?

[button setImage:[UIImage imageNamed:@"btn_select_s.png"] forState:0];
[button setImage:[UIImage imageNamed:@"btn_select_p.png"] forState:1];
[button setTitle:@"my title" forState:0];

Answer 1

You can use UIButton's titleEdgeInsets and imageEdgeInsets to position title and image as you want.

See Apple's UIButton reference documentation

For example, in a UIButton subclass:

[self setImageEdgeInsets:UIEdgeInsetsMake(imageFrame.origin.y, imageFrame.origin.x, 0, 0)];
[self setTitleEdgeInsets:UIEdgeInsetsMake(labelFrame.origin.y, labelFrame.origin.x, 0, 0)];

Answer 2

您需要改为设置按钮的背景图像：

[button setBackgroundImage:[UIImage imageNamed:@"foo"] forState:UIControlStateNormal];

Answer 3

[button setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
[button setContentVerticalAlignment:UIControlContentVerticalAlignmentTop];

//Use you values for edge insets here.
[button setTitleEdgeInsets:UIEdgeInsetsMake(20.0f, 10.0f, 0.0f, 0.0f)];

Answer 4

There is a convenient UIButton subclass here:
https://github.com/lionhylra/FlexButton

It has features like: - It provides 4 layout styles.
- It works as simple as UIButton.
- When you adjust the size of button, the size of imageView and titleLabel will change accordingly and correctly. They will not be put into disorder. This is the essential difference to using edge inset.
- TitleLabel and imageView will always be centered vertically and horizantally.