设置图像的代码中的UIButton
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16-09-2019 - |
题
您如何在代码中设置该图像获得的UIButton?
我有这样的:
UIButton *btnTwo = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btnTwo.frame = CGRectMake(40, 140, 240, 30);
[btnTwo setTitle:@"vc2:v1" forState:UIControlStateNormal];
[btnTwo addTarget:self action:@selector(goToOne) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btnTwo];
但看不出有什么会设置图像吧。
解决方案
目标-C
UIImage *btnImage = [UIImage imageNamed:@"image.png"];
[btnTwo setImage:btnImage forState:UIControlStateNormal];
夫特4
let btnImage = UIImage(named: "image")
btnTwo.setImage(btnImage , for: UIControlState.normal)
其他提示
迈克的解决方案将只显示图像,但在按钮上设置的任何标题将不可见的,因为你可以设置标题或图片。
如果您要设置两个(图像和标题)使用下面的代码:
btnImage = [UIImage imageNamed:@"image.png"];
[btnTwo setBackgroundImage:btnImage forState:UIControlStateNormal];
[btnTwo setTitle:@"Title" forState:UIControlStateNormal];
在这会为我工作,我有一个基于图像帧大小来明确调整按钮框。
UIImage *listImage = [UIImage imageNamed:@"list_icon.png"];
UIButton *listButton = [UIButton buttonWithType:UIButtonTypeCustom];
// get the image size and apply it to the button frame
CGRect listButtonFrame = listButton.frame;
listButtonFrame.size = listImage.size;
listButton.frame = listButtonFrame;
[listButton setImage:listImage forState:UIControlStateNormal];
[listButton addTarget:self.navigationController.parentViewController
action:@selector(revealToggle:)
forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *jobsButton =
[[UIBarButtonItem alloc] initWithCustomView:listButton];
self.navigationItem.leftBarButtonItem = jobsButton;
在夫特用户的情况下
// case of normal image
let image1 = UIImage(named: "your_image_file_name_without_extension")!
button1.setImage(image1, forState: UIControlState.Normal)
// in case you don't want image to change when "clicked", you can leave code below
// case of when button is clicked
let image2 = UIImage(named: "image_clicked")!
button1.setImage(image2, forState: UIControlState.Highlight)
您可以像下面这样做
[btnTwo setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(0, 0, 150, 44);
[btn setBackgroundImage:[UIImage imageNamed:@"buttonimage.png"]
forState:UIControlStateNormal];
[btn addTarget:self
action:@selector(btnSendComment_pressed:)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
可以把图像中的任何一种方式:
UIButton *btnTwo = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btnTwo.frame = CGRectMake(40, 140, 240, 30);
[btnTwo setTitle:@"vc2:v1" forState:UIControlStateNormal];
[btnTwo addTarget:self
action:@selector(goToOne)
forControlEvents:UIControlEventTouchUpInside];
[btnTwo setImage:[UIImage imageNamed:@"name.png"] forState:UIControlStateNormal];
//OR setting as background image
[btnTwo setBackgroundImage:[UIImage imageNamed:@"name.png"]
forState:UIControlStateNormal];
[self.view addSubview:btnTwo];
我正在寻找一种解决方案的UIImage
添加到我的UIButton
。问题只是它比显示所需要的图像更大。只是帮我这个:
_imageViewBackground = [[UIImageView alloc] initWithFrame:rectImageView];
_imageViewBackground.image = [UIImage imageNamed:@"gradientBackgroundPlain"];
[self addSubview:_imageViewBackground];
[self insertSubview:_imageViewBackground belowSubview:self.label];
_imageViewBackground.hidden = YES;
每次我要显示我的UIImageView
我只设置了var hidden
到YES
或NO
。
可能有其他的解决方案,但我这个东西弄糊涂了这么多次,这解决了它,我没有需要处理内部的东西UIButton
在后台做的。
不要担心这么多帧从代码的按钮,你可以做,在故事板。这个工作对我来说,一个线...更加简单。
[self.button setBackgroundImage:[UIImage imageNamed: @"yourPic.png"] forState:UIControlStateNormal];
-(void)buttonTouched:(id)sender
{
UIButton *btn = (UIButton *)sender;
if( [[btn imageForState:UIControlStateNormal] isEqual:[UIImage imageNamed:@"icon-Locked.png"]])
{
[btn setImage:[UIImage imageNamed:@"icon-Unlocked.png"] forState:UIControlStateNormal];
// other statements....
}
else
{
[btn setImage:[UIImage imageNamed:@"icon-Locked.png"] forState:UIControlStateNormal];
// other statements....
}
}
<强>夫特3版强>(butt_img必须的图像设定成的 Assets.xcassets 强>或 Images.xcassets 强>在Xcode文件夹):
btnTwo.setBackgroundImage(UIImage(named: "butt_img"), for: .normal)
btnTwo.setTitle("My title", for: .normal)
无论如何,如果你想进行缩放以填充按钮的尺寸的图像,你可以添加一个UIImageView
了它,并为其分配图像:
let img = UIImageView()
img.frame = btnTwo.frame
img.contentMode = .scaleAspectFill
img.clipsToBounds = true
img.image = UIImage(named: "butt_img")
btnTwo.addSubview(img)
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