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iosswiftcalendaruiimageuicolor

create UIImage to be a border with color

I am using FSCalendar What I want to do is change the way of showing events. I want to put a coloured rectangle border around the cell with events. I did that by editing the cell background layer and worked fine, but now I realized that it is the wrong place to put my code as updating to the latest version of FSCalendar which will override my changes. One of what I can access by the calendar delegates is to set image to the cell, So I want to create image as rectange border with the event colour. Here is an image of what I want: Calendar With events as rectangle border

Any suggessions is appreicated. Thanks in advance.

Solution

  • This method will draw a bordered rectangle. I would make it class method and put into UIImage category for convenient use.

    - (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)imageSize andBorderWidth:(CGFloat)borderWidth fillWithColor:(BOOL)fillWithColor{

    UIGraphicsBeginImageContext(imageSize);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGRect rect = CGRectMake(0, 0, imageSize.width, imageSize.height);

    if(fillWithColor) {
        [color setFill];
        CGContextFillRect(context, rect);
    } else {
        [color setStroke];
        CGContextStrokeRectWithWidth(context, rect, borderWidth);
    }

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

    EDIT: Added fillWithColor parameter