我在渲染视图控件的图像时出现问题,该控件具有带自定义uiappearance设置的滑块。图像渲染得很好,但是,图像中的滑块只有默认外观。如果我转到那个viewcontroller(vc2),uiappearance将设置为自定义外观。有关如何使用自定义滑块外观渲染图像的任何想法吗?
我在First View Controller上有一个UIImageView。在第二个视图控制器上,我有一个滑块。
ViewController *vc2 = [[ViewController alloc]init];
vc2 = [self.storyboard instantiateViewControllerWithIdentifier:@"vc2"];
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size,NO,0.0);
[vc2.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[_image setImage:viewImage];
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self customizeAppearance];
// Override point for customization after application launch.
return YES;
}
- (void) customizeAppearance; {
UIImage *minImage = [[UIImage imageNamed:@"slider_minimum.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 0)];
UIImage *maxImage = [[UIImage imageNamed:@"slider_maximum.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 13)];
UIImage *thumbImage = [UIImage imageNamed:@"slider_thumb.png"];
[[UISlider appearance] setMaximumTrackImage:maxImage
forState:UIControlStateNormal];
[[UISlider appearance] setMinimumTrackImage:minImage
forState:UIControlStateNormal];
[[UISlider appearance] setThumbImage:thumbImage
forState:UIControlStateNormal];
[[UISlider appearance] setThumbImage:thumbImage
forState:UIControlStateHighlighted];
}
答案 0 :(得分:0)
感谢@PartiallyFinite方向,我发现我需要在ViewController中执行以下操作。:
UIImage *minImage = [UIImage imageNamed:@"slider_minimum.png"];
UIImage *maxImage = [UIImage imageNamed:@"slider_maximum.png"];
UIImage *tumbImage= [UIImage imageNamed:@"slider_thumb.png"];
minImage = [minImage resizableImageWithCapInsets:UIEdgeInsetsMake(0, 3, 0, 0)];
maxImage = [maxImage resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 13)];
[_slider setMinimumTrackImage:minImage forState:UIControlStateNormal];
[_slider setMaximumTrackImage:maxImage forState:UIControlStateNormal];
[_slider setThumbImage:tumbImage forState:UIControlStateNormal];