Iphone 带图像的UI按钮
我有一个使用IB的按钮。现在我想以编程方式向按钮添加一个图像。我如何设置按钮的大小图像的大小,就像我们在IB布局->大小,以适应。我想用编程的方式来做 谢谢..示例代码Iphone 带图像的UI按钮,iphone,uibutton,Iphone,Uibutton,我有一个使用IB的按钮。现在我想以编程方式向按钮添加一个图像。我如何设置按钮的大小图像的大小,就像我们在IB布局->大小,以适应。我想用编程的方式来做 谢谢..示例代码 UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; UIImage *img1 = [UIImage imageNamed:@"image1.png"]; btn.frame = CGRectMake(20.0 , 270.0, img1.size.widt
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *img1 = [UIImage imageNamed:@"image1.png"];
btn.frame = CGRectMake(20.0 , 270.0, img1.size.width, img1.size.height);
[btn setImage:img1 forState:UIControlStateNormal];
UIImage *img2 = [UIImage imageNamed:@"image2.png"];
[btn setImage:img2 forState:UIControlStateHighlighted];
[btn setImage:img2 forState:UIControlStateSelected];
[btn addTarget:self action:@selector(Action:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
您可以使用
UIButton
的setImage:forState:
方法向按钮添加图像,然后使用UIView
的contentMode
属性设置内容大小
示例如下所示:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *img = [UIImage imageNamed:@"myImage.png"];
button.frame = CGRectMake(20, 100, img.size.width, img.size.height);
[button setImage:img forState:UIControlStateNormal];
[button setImage:img forState:UIControlStateHighlighted];
[button setImage:img forState:UIControlStateSelected];
button.contentMode = UIViewContentModeScaleToFill; //Look up UIViewContentMode in the documentation for other options
[self.view addSubview:button];
其中,contentMode
的值可以是以下任一值
typedef enum {
UIViewContentModeScaleToFill,
UIViewContentModeScaleAspectFit, // contents scaled to fit with fixed aspect. remainder is transparent
UIViewContentModeScaleAspectFill, // contents scaled to fill with fixed aspect. some portion of content may be clipped.
UIViewContentModeRedraw, // redraw on bounds change (calls -setNeedsDisplay)
UIViewContentModeCenter, // contents remain same size. positioned adjusted.
UIViewContentModeTop,
UIViewContentModeBottom,
UIViewContentModeLeft,
UIViewContentModeRight,
UIViewContentModeTopLeft,
UIViewContentModeTopRight,
UIViewContentModeBottomLeft,
UIViewContentModeBottomRight,
} UIViewContentMode;
我认为这可以帮助您使用UIButton(实际上是UIView)的sizeToFit方法。谢谢您的分享!!对于从该解决方案进行复制和粘贴的人,他将
UIControlStateHighlighted
拼写错误。
typedef enum {
UIViewContentModeScaleToFill,
UIViewContentModeScaleAspectFit, // contents scaled to fit with fixed aspect. remainder is transparent
UIViewContentModeScaleAspectFill, // contents scaled to fill with fixed aspect. some portion of content may be clipped.
UIViewContentModeRedraw, // redraw on bounds change (calls -setNeedsDisplay)
UIViewContentModeCenter, // contents remain same size. positioned adjusted.
UIViewContentModeTop,
UIViewContentModeBottom,
UIViewContentModeLeft,
UIViewContentModeRight,
UIViewContentModeTopLeft,
UIViewContentModeTopRight,
UIViewContentModeBottomLeft,
UIViewContentModeBottomRight,
} UIViewContentMode;