Getting rid of `CGContextSetTextMatrix: invalid context` about rtlabel HOT 5 CLOSED

Forgot to mention, you'd need to wrap the context-sensitive lines in RTLabel.m (round line 216) in a conditional, like so:

if (context != NULL)
{
    // Drawing code.
    CGContextSetTextMatrix(context, CGAffineTransformIdentity);
    CGAffineTransform flipVertical = CGAffineTransformMake(1,0,0,-1,0,self.frame.size.height);
    CGContextConcatCTM(context, flipVertical);
}

from rtlabel.

Actually, it's a lot easier than that. Let me close this issue and give you a pull request.

CGContextRef context = UIGraphicsGetCurrentContext();
if (context != NULL)
{
    // Drawing code.
    CGContextSetTextMatrix(context, CGAffineTransformIdentity);
    CGAffineTransform flipVertical = CGAffineTransformMake(1,0,0,-1,0,self.frame.size.height);
    CGContextConcatCTM(context, flipVertical);
}

from rtlabel.

Thanks for all the effort. I don't get what you mean by:

"You can fix this by changing the -(void)render method to pass a context, like -(void)render:(CGContextRef)context and then either call [self render:UIGraphicsGetCurrentContext()]; from within the drawRect or [self render:NULL]; from the other places."

C is still a bit foreign to me.

from rtlabel.

Nevermind this issue, the pull request you merged is simpler and still does
the same. For the fact that C is a bit foreign to you, you've made a rather
good effort!

Cheers,
EP.

On Sat, May 21, 2011 at 2:35 PM, honcheng <
[email protected]>wrote:

Thanks for all the effort. I don't get what you mean by:

"You can fix this by changing the -(void)render method to pass a context,
like -(void)render:(CGContextRef)context and then either call [self
render:UIGraphicsGetCurrentContext()]; from within the drawRect or [self
render:NULL]; from the other places."

C is still a bit foreign to me.

Reply to this email directly or view it on GitHub:
#3 (comment)

from rtlabel.

Thanks :p

from rtlabel.