Question

I want to make a NSString notification like this: “You must pay 4.00 dollar.”.The money has a red color.In Android ,I can use HTML.formhtml do it.But I don’t know how to do it in IOS.Who can help me?

Answer 1

try this code

CATextLayer *aTextLayer_= [[[CATextLayer alloc]init] autorelease];
    aTextLayer_.frame = CGRectMake(10, 100, 300, 50);
    aTextLayer_.backgroundColor=[UIColor clearColor].CGColor;
    aTextLayer_.foregroundColor = [[UIColor redColor] CGColor];
    aTextLayer_.alignmentMode=kCAAlignmentCenter;
    aTextLayer_.contentsScale = [[UIScreen mainScreen] scale];
    aTextLayer_ .wrapped=YES;
    [aTextLayer_ setAlignmentMode:kCAAlignmentLeft];

    UIFont *smallFont = [UIFont systemFontOfSize:25];
    CTFontRef ctSmallFont = CTFontCreateWithName((CFStringRef)smallFont.fontName, smallFont.pointSize, NULL);

    UIFont *boldFont = [UIFont systemFontOfSize:25];
    CTFontRef ctBoldFont = CTFontCreateWithName((CFStringRef)boldFont.fontName, boldFont.pointSize, NULL);

    CGColorRef cgColor = [UIColor greenColor].CGColor;
    CGColorRef cgColor1 = [UIColor redColor].CGColor;

    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                (id)ctSmallFont, (id)kCTFontAttributeName,
                                cgColor, (id)kCTForegroundColorAttributeName, nil];

    NSDictionary *subattributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                   (id)ctBoldFont, (id)kCTFontAttributeName,
                                   cgColor1, (id)kCTForegroundColorAttributeName, nil];
    CFRelease(ctBoldFont);
    NSString *subString=@"You must pay 4.00 dollar.";
    NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:subString attributes:attributes];

    [attrStr addAttributes:subattributes range:NSMakeRange(13,4)];
    aTextLayer_.string=attrStr;
    [self.view.layer addSublayer:aTextLayer_];