Custom UIProgressView drawing weirdness
- by Werner
I am trying to create my own custom UIProgressView by subclassing it and then overwrite the drawRect function.
Everything works as expected except the progress filling bar. I can't get the height and image right.
The images are both in Retina resolution and the Simulator is in Retina mode.
The images are called: "[email protected]" (28px high) and "[email protected]" (32px high).
CustomProgressView.h
#import <UIKit/UIKit.h>
@interface CustomProgressView : UIProgressView
@end
CustomProgressView.m
#import "CustomProgressView.h"
@implementation CustomProgressView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width, 16);
UIImage *progressBarTrack = [[UIImage imageNamed:@"progressBarTrack"] resizableImageWithCapInsets:UIEdgeInsetsZero];
UIImage *progressBar = [[UIImage imageNamed:@"progressBar"] resizableImageWithCapInsets:UIEdgeInsetsMake(4, 4, 5, 4)];
[progressBarTrack drawInRect:rect];
NSInteger maximumWidth = rect.size.width - 2;
NSInteger currentWidth = floor([self progress] * maximumWidth);
CGRect fillRect = CGRectMake(rect.origin.x + 1, rect.origin.y + 1, currentWidth, 14);
[progressBar drawInRect:fillRect];
}
@end
The resulting ProgressView has the right height and width. It also fills at the right percentage (currently set at 80%). But the progress fill image isn't drawn correctly.
Does anyone see where I go wrong?
