Text 仅使用1个UILabel子类创建笔划和阴影效果

我正在尝试创建一个UILabel子类，该子类将完成我使用以下方法堆叠的两个独立UILabel的任务：

背景标签：

- (void)drawTextInRect:(CGRect)rect {

CGSize shadowOffset = self.shadowOffset;
//UIColor *textColor = self.textColor;

CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(c, 3);

CGContextSetTextDrawingMode(c, kCGTextStroke);
self.textColor = [UIColor whiteColor];
[super drawTextInRect:rect];

self.alpha = .1;

self.shadowOffset = shadowOffset;

}

- (void)drawTextInRect:(CGRect)rect {

CGSize shadowOffset = self.shadowOffset;
UIColor *textColor = self.textColor;

CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(c, 2);

CGContextSetTextDrawingMode(c, kCGTextStroke);
self.textColor = [UIColor blackColor];
[super drawTextInRect:rect];


CGContextSetTextDrawingMode(c, kCGTextFill);
self.textColor = textColor;
self.shadowOffset = CGSizeMake(0, 0);
[super drawTextInRect:rect];

self.alpha = .5;

self.shadowOffset = shadowOffset;

}

前景标签：

- (void)drawTextInRect:(CGRect)rect {

CGSize shadowOffset = self.shadowOffset;
//UIColor *textColor = self.textColor;

CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(c, 3);

CGContextSetTextDrawingMode(c, kCGTextStroke);
self.textColor = [UIColor whiteColor];
[super drawTextInRect:rect];

self.alpha = .1;

self.shadowOffset = shadowOffset;

}

- (void)drawTextInRect:(CGRect)rect {

CGSize shadowOffset = self.shadowOffset;
UIColor *textColor = self.textColor;

CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(c, 2);

CGContextSetTextDrawingMode(c, kCGTextStroke);
self.textColor = [UIColor blackColor];
[super drawTextInRect:rect];


CGContextSetTextDrawingMode(c, kCGTextFill);
self.textColor = textColor;
self.shadowOffset = CGSizeMake(0, 0);
[super drawTextInRect:rect];

self.alpha = .5;

self.shadowOffset = shadowOffset;

}

有没有办法只使用1个UILabel子类来完成这2组影响？

试试下面的代码：

UILabel* label = [[UILabel alloc] init];
label.shadowColor = [UIColor grayColor];
label.shadowOffset = CGSizeMake(0,1);