Ios 使用背景色绘制NSString以填充rect
我有以下代码:Ios 使用背景色绘制NSString以填充rect,ios,objective-c,core-text,Ios,Objective C,Core Text,我有以下代码: NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy]; style.alignment = NSTextAlignmentCenter; [ticketName.uppercaseString drawInRect:CGRectMake(xPos, yPos, badgeSize.width - UIBarcode.size.width, 44) withAt
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
style.alignment = NSTextAlignmentCenter;
[ticketName.uppercaseString drawInRect:CGRectMake(xPos, yPos, badgeSize.width - UIBarcode.size.width, 44) withAttributes:@{NSFontAttributeName: FONT_NORMALX(40), NSForegroundColorAttributeName: [UIColor whiteColor], NSBackgroundColorAttributeName: [UIColor blackColor], NSParagraphStyleAttributeName: style}];
这就产生了这样的结果:
我想要的是“GA”的背景色(黑色)来填充给定的矩形,这样它就变成了一个大的黑色条,里面的文本居中。这可能吗 正如@beyowulf所建议的那样。使用UIBezierPath对rect进行daw,然后用字符串填充它
CGContextRef context = UIGraphicsGetCurrentContext();
// Text Drawing
CGRect textRect = //bezier Rect
UIBezierPath* textPath = [UIBezierPath bezierPathWithRect: textRect];
[UIColor.blackColor setFill];
[textPath fill];
NSString* textContent = @"GA";
NSMutableParagraphStyle* textStyle = [NSMutableParagraphStyle new];
textStyle.alignment = NSTextAlignmentCenter;
NSDictionary* textFontAttributes = @{NSFontAttributeName: [UIFont systemFontOfSize: UIFont.smallSystemFontSize], NSForegroundColorAttributeName: UIColor.whiteColor, NSParagraphStyleAttributeName: textStyle};
CGFloat textTextHeight = [textContent boundingRectWithSize: CGSizeMake(textRect.size.width, INFINITY) options: NSStringDrawingUsesLineFragmentOrigin attributes: textFontAttributes context: nil].size.height;
CGContextSaveGState(context);
CGContextClipToRect(context, textRect);
[textContent drawInRect: CGRectMake(CGRectGetMinX(textRect), CGRectGetMinY(textRect) + (CGRectGetHeight(textRect) - textTextHeight) / 2, CGRectGetWidth(textRect), textTextHeight) withAttributes: textFontAttributes];
CGContextRestoreGState(context);
结果如下:
尝试添加空白并用它们绘制。使用
uibeziercrove
绘制矩形,填充矩形,然后绘制字符串。如果您知道应该绘制字符串的位置,这很容易。(在本例中,您可以简单地使用两个视图。)通常您不知道这一点。