设置图像的代码中的UIButton

Question

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。

Answer 1

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)

Answer 2

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];

Answer 3

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;

Answer 4

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) 

Answer 5

您可以像下面这样做

[btnTwo setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];

Answer 6

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];

Answer 7

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];

Answer 8

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。

Answer 9

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];

Answer 10

-(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....
    }
}

Answer 11

<强>夫特3版（butt_img必须的图像设定成的 Assets.xcassets 或 Images.xcassets 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)