我想创建一个UIPickerView,其中包含一些图像,但我似乎无法弄清楚如何让图像适合视图(现在它们太大了,相互重叠)。我试图使用函数来调整每个图像时,它的绘制,但我收到错误时,函数被调用,虽然程序编译和运行良好(图像不调整大小除外)。调整大小功能和初始化功能是:在UIImageView中调整UIImage的大小
-(UIImage *)resizeImage:(UIImage *)image width:(int)width height:(int)height {
NSLog(@"resizing");
CGImageRef imageRef = [image CGImage];
CGImageAlphaInfo alphaInfo = CGImageGetAlphaInfo(imageRef);
//if (alphaInfo == kCGImageAlphaNone)
alphaInfo = kCGImageAlphaNoneSkipLast;
CGContextRef bitmap = CGBitmapContextCreate(NULL, width, height, CGImageGetBitsPerComponent(imageRef),
4 * width, CGImageGetColorSpace(imageRef), alphaInfo);
CGContextDrawImage(bitmap, CGRectMake(0, 0, width, height), imageRef);
CGImageRef ref = CGBitmapContextCreateImage(bitmap);
UIImage *result = [UIImage imageWithCGImage:ref];
CGContextRelease(bitmap);
CGImageRelease(ref);
return result;
}
- (void)viewDidLoad {
UIImage *h1 = [UIImage imageNamed:@"h1.png"];
h1 = [self resizeImage:h1 width:50 height: 50];
UIImageView *h1View = [[UIImageView alloc] initWithImage:h1];
NSArray *imageViewArray = [[NSArray alloc] initWithObjects:
h1View, nil];
NSString *fieldName = [[NSString alloc] initWithFormat:@"column1"];
[self setValue:imageViewArray forKey:fieldName];
[fieldName release];
[imageViewArray release];
[h1View release];
}
控制台输出:
TabTemplate [29322:207]调整
TabTemplate [29322]:CGBitmapContextCreate:不支持的色彩空间
TabTemplate [ 29322]:CGContextDrawImage:invalid context
TabTempla te [29322]:CGBitmapContextCreateImage:无效的上下文
我找不出什么问题。任何帮助是极大的赞赏。
情况下,你是否通过CGImageGetColorSpace(imageRef)返回的值是CGBitmapContextCreate接受的价值观吗? – Bemmu 2011-06-17 05:20:05