小编ij_*_*ij_的帖子

我使用以下代码为我创建图像 UITabBarItem

self.tabBarItem.image = [UIImage imageNamed:@"tab_img.png"];

tab_img.png由黑色,白色和清晰的颜色组成.但在应用程序中,黑白图像的所有部分都变为灰色.我怎么能把这个灰色变成白色？

如何改变的大小宽度UIImagePickerController上iPad？我可以改变高度,所以它是700但不能改变宽度,它仍然是320.我的代码.

 UIImagePickerController*  imagePicker=[[UIImagePickerController alloc]init];
 imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 imagePicker.delegate=self;
 CGRect myRect = CGRectMake(imagePicker.view.frame.origin.x, imagePicker.view.frame.origin.y, 720, 700);
 imagePicker.view.frame = myRect;
 self.popover = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
 myRect = CGRectMake(100, 880, 900, 900);
 CGRect re2 = CGRectMake(0,0,800,800);
 [self.popover setPopoverContentSize:re2.size];
 [self.popover presentPopoverFromRect:[self.view bounds] inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
 [self.popover presentPopoverFromRect:myRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];      
 [self.popover setPopoverContentSize:re2.size];