我想创建一个图像的缩略图,我从图片库或相机使用UIImagePickerController导入使用- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo当我使用相机时,点击图像的缩略图很容易创建,但是当通过从照片库中选择图像完成相同的操作时,我的应用程序崩溃。当我在应用程序中启用NSZombie时,它显示f- [UIImage drawInRect:]:消息发送到释放实例0x5abc140上myThumbnail变量..在iPhone中创建图像的缩略图?
我可能做错什么?
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo
{
[self saveImage:selectedImage];
}
- (void)saveImage:(UIImage *)img
{
myThumbNail = img;
UIGraphicsBeginImageContext(CGSizeMake(60.0,60.0));
[myThumbNail drawInRect:CGRectMake(0.0, 0.0, 60.0, 60.0)];// gets killed here
}
这是您正在使用的确切代码? – 2011-04-12 02:49:54