在iPhone中画线

Question

I am using below method to draw string.

-(void) drawRect:(CGRect)rect
{
    NSString *mName = @"Hi what are you doing";
    [mName drawInRect:CGRectMake(0,0,100,12) withFont:[UIFont boldSystemFontOfSize:12] lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentCenter]
}

Is it possible to draw to "Hi" in different font, "what" in different font in iPhone.

Answer 1

Use the method drawAtPoint:withFont: for drawing of each word. You must compute the position of each drawn string. This can be done with sizeWithFont: -method. For example:

NSString* firstString = @"Hi ";
NSString* secondString = @"what";
// where to draw
CGPoint position = CGPointMake(0, 0); 
CGFloat offset = [firstString sizeWithFont:font1].width + kSpaceBetweenWords;
// draw "Hi" with font1
[firstString drawAtPoint:position withFont:font1]; 
// draw "what" with font2
[secondString drawAtPoint:CGPointMake(position.x+offset, position.y) withFont:font2]; 

Answer 2

No, you need to do two draw requests - one for each font - but that is rather trivial.

What is not trivial is to know where to place the text if the text is dynamic. In that case I would recommend subclassing UIView and the drawRect method and just draw it yourself.

Answer 3

NSAttributedString is available for iOS 3.2 later. you can try this. Or else core text library is there to achieve the same...