CODEWITHSUNDEEP
iosobjective-cuislider
代思思
代思思

Reputation: 13

Setting ThumbImage for UISlider is vague

image

这是我设置slider的thumbImage

 [_slider setThumbImage:[UIImage getRoundImageWithColor:SharedColor.themeGreen size:CGSizeMake(20, 20)] forState:UIControlStateNormal];

This is the thumbImage that is drawn。I am in order to show the video playback progress bar

+ (UIImage *)getRoundImageWithColor:(UIColor*)color size:(CGSize)size{

CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);     
CGContextFillEllipseInRect(context, rect);

UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;}

Upvotes: 1

Views: 171

Answers (1)

Chandresh Kachariya
Chandresh Kachariya

Reputation: 677

UIImage *image = [[UIImage imageNamed:@"imageName.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

OR

UIImage *image = [self imageWithColor:[UIColor redColor]];

Set Image in a slider.

[slider setThumbImage:[self imageWithImage:image scaledToSize:CGSizeMake(32, 59)] forState:UIControlStateNormal];

This is the thumbImage that is drawn in the slider.

- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
    //UIGraphicsBeginImageContext(newSize);
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

Pass UIColor and create an image if we have not any image.

- (UIImage *)imageWithColor:(UIColor *)color
{
    CGRect rect = CGRectMake(0.0f, 0.0f, 32.0f, 32.0f);
    UIGraphicsBeginImageContextWithOptions(rect.size, CGColorGetAlpha(color.CGColor) == 1.0f , 0.0f);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, color.CGColor);
    CGContextFillRect(context, rect);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

Upvotes: 1

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