iOS绘制view
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
UIBezierPath *roundedRect = [UIBezierPath bezierPathWithRoundedRect:self.bounds cornerRadius:[self cornerRadius]];
[roundedRect addClip];
[[UIColor whiteColor] setFill];
UIRectFill(self.bounds);
[[UIColor blackColor] setStroke];
[roundedRect stroke];
if(self.faceUP){
UIImage *faceImage = [UIImage imageNamed:[NSString stringWithFormat:@"%@%@", [self rankAsString], self.suit]];
if (faceImage) {
CGRect imageRect = CGRectInset(self.bounds,
self.bounds.size.width * (1.0-self.faceCardScaleFactor),
self.bounds.size.height * (1.0-self.faceCardScaleFactor));
[faceImage drawInRect:imageRect];
} else {
[self drawPips];
}
[self drawCorners];
}else{
[[UIImage imageNamed:@"cardback"] drawInRect:self.bounds];
}
NSLog(@"drawRect");
}
这里设置了倒角，阴影，颜色，还有图片
- (void)pushContextAndRotateUpsideDown
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
CGContextTranslateCTM(context, self.bounds.size.width, self.bounds.size.height);
CGContextRotateCTM(context, M_PI);
}
- (void)popContext
{
CGContextRestoreGState(UIGraphicsGetCurrentContext());
}
#pragma mark - Corners
- (void)drawCorners
{
NSMutableParagraphStyle *paragraphyStyle = [[NSMutableParagraphStyle alloc] init];
paragraphyStyle.alignment = NSTextAlignmentCenter;
UIFont *cornerFont = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
cornerFont = [cornerFont fontWithSize:cornerFont.pointSize * [self cornerScaleFactor]];
NSAttributedString *cornerText = [[NSAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@\n%@", [self rankAsString], self.suit] attributes:@{ NSFontAttributeName : cornerFont, NSParagraphStyleAttributeName : paragraphyStyle}];
CGRect textBounds;
textBounds.origin = CGPointMake([self cornerOffset], [self cornerOffset]);
textBounds.size = [cornerText size];
[cornerText drawInRect:textBounds];
[self pushContextAndRotateUpsideDown];
[cornerText drawInRect:textBounds];
[self popContext];
}
这里设置了角落上的suit和rank
