ios 为自定义 UIView 设置背景图像
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Set background Image for a Custom UIView
提问by Saad
I am developing a paint application using OpenGL.
我正在使用 OpenGL 开发绘画应用程序。
I am using "CUSTOM UIView" for drawing on a screen and another UIImageView to set background image to it. Have a look at screenshot to understand it clearly.. My problem is I am not able to set background image on either of the view.. I have to use different textures as a drawing board on which I have to Paint. Can anyone suggest what is incorrect in this approach??
我正在使用“CUSTOM UIView”在屏幕上绘图，并使用另一个 UIImageView 为其设置背景图像。看一下屏幕截图以清楚地理解它.. 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我必须在其上绘画的绘图板。谁能建议这种方法有什么不正确的地方？
I have used this code for custom UIView but not getting success.. but it shows white default background only..
我已将此代码用于自定义 UIView 但没有成功..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];
}
回答by ram
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];
回答by Saad
use this
用这个
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Default"]];
回答by Bojan Bozovic
- (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;
}
You just had to add return self; It works perfectly fine for me...
你只需要添加 return self ；它对我来说非常好......
回答by Paul Warkentin
Try this:
尝试这个：
UIImageView *background = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Rough_White_Paper_with_tape.png"]];
[self addSubview:background];
[self sendSubviewToBack:background];
[background release];
回答by Surjit Joshi
Try this:
尝试这个：
UIImageView *myImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed :@“abc.png"]];
UIView *myUIView = [[UIImageView alloc] initWithFrame :CGRectMake(10,10,250,250)];
myUIView = myImageView;
回答by clqiao
set background with UIImageView is not graceful。 should use following API:
用 UIImageView 设置背景不优雅。 应该使用以下 API：
self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"whiteBackground.png"]];
回答by Shahryar
this is in swift 2
这是在 swift 2
var background = UIImageView(image: UIImage(named: "image.jpg"))
self.addSubview(background)
self.sendSubviewToBack(background)
回答by Himanshu Mahajan
Use this
用这个
self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"image.png"]];
