Fuzzy graphics when CGRect given float value

[jonc]

Has anyone else noticed that UIObjects are fuzzy if you set any of their values in the rect of their frame to float values? This makes sense, but I wasn't sure if it was intended behavior. For example, I have a label that I wan't to place dynamically depending on the size of a cell's content view:

weightLbl.frame = CGRectMake((self.contentView.frame.size.width * 0.445), weightLbl.frame.origin.y, weightLbl.frame.size.width, weightLbl.frame.size.height);

If I use that line the label shows up a little bit "fuzzy" looking on the screen. I figured out a workaround though, I just have to cast the result of that multiplication as an int, like this:

weightLbl.frame = CGRectMake(((int)(self.contentView.frame.size.width * 0.445)), weightLbl.frame.origin.y, weightLbl.frame.size.width, weightLbl.frame.size.height);

I would think that it would convert the frame to an integer just thinking from a graphics perspective. Do you all think that is supposed to be happening?

[scottiphone]

As I recall on the Mac the drawing happens at .5 for auto-antialias. You coudl try offsetting as well and see if that works.

[BuschyBoy]

Just on the simulator or on the device itself, too?

[jonc]

I think it was on both the simulator and the phone actually. It could have been because I was accidentally (lol) laying out my view in the drawrect method of a table cell, but I had cast everything as an int before I took it out. It can confirm it was doing it in drawrect though. I will try it again when I get to work tomorrow because that is strange. It didn't look pretty like anti-aliasing, it looked fuzzy.

It could have been that the tiny drop shadow on the text was making the anti-aliasing look like blur.

[jeff_lamarche]

The engine that drives the graphics on the iPhone (and the Mac) are designed to be device and resolution independent, so if you give it a floating point value, it will do its best to give you what you want, most likely by anti-aliasing the pixels on either side of the value you specified.

That's my guess from working with Quartz on the Mac, though, I haven't dived much into custom drawing yet on the iPhone.

[jonc]

That seems to be the what is happening so the iPhone must do it too. I didn't know that, it makes a lot more sense why everything looks prettier in Mac OS and on the iPhone.

Try giving your text a drop shadow with a size of (0.5,0.5), it looks pretty.