Question

我正在使用OpenGL开发一个绘图应用程序。

我使用“CUSTOM UIView”在屏幕上绘图，而另一个UIImageView用于设置背景图像。看看截图，清楚地了解它。我的问题是我无法在任何一个视图上设置背景图像。我必须使用不同的纹理作为绘图板，我必须在其上绘画。任何人都可以建议这种方法中的错误吗？

Imagelink http://img835.imageshack.us/img835/9794/screenshot20110802at345.png

我已将此代码用于自定义UIView但未获得成功..但它仅显示白色默认背景..

- (id)initWithCoder:(NSCoder*)coder 
{

    UIColor *background = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"Rough_White_Paper_with_tape.png"]];
    self.backgroundColor = background;

      [background release];     
}

Answer 1

NSURL *imgUrl=[[NSURL alloc] initWithString:@"http://img835.imageshack.us/img835/9794/screenshot20110802at345.png"];
NSData *imgData = [NSData dataWithContentsOfURL:imgUrl];
UIImage *img = [UIImage imageWithData:imgData];

imageView = [[UIImageView alloc] initWithImage:img];

[self addSubview:imageView ];
[self sendSubviewToBack:imageView ];

[imageView release]; [imgUrl release];

Answer 2

使用此

self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Default"]];

Answer 3

   - (id)initWithCoder:(NSCoder*)coder 
      {
       self = [super initWithCoder:coder];
       if (self) {
            UIColor *background = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"Rough_White_Paper_with_tape.png"]];
            self.backgroundColor = background;

            [background release];
       }

       return self;

      }

你只需添加回归自我;它对我来说非常好......

Answer 4

试试这个：

UIImageView *background = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Rough_White_Paper_with_tape.png"]];
[self addSubview:background];
[self sendSubviewToBack:background];
[background release];

Answer 5

试试这个：

 UIImageView *myImageView = [[UIImageView alloc] initWithImage : 
                  [UIImage imageNamed :@“abc.png"]];
 UIView *myUIView = [[UIImageView alloc] initWithFrame :CGRectMake(10,10,250,250)];
 myUIView = myImageView;

Answer 6

使用UIImageView设置背景并不优雅。应该使用以下API：

self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"whiteBackground.png"]];

Answer 7

这是在swift 2

var background = UIImageView(image: UIImage(named: "image.jpg"))
self.addSubview(background)
self.sendSubviewToBack(background)

Answer 8

使用此

   self.view.backgroundColor=[[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"image.png"]];

设置自定义UIView的背景图像

8 个答案: