CoreGraphics无法在iOS 7.0模拟器上运行

时间:2013-09-23 20:50:54

标签: ios core-graphics ios7

自iOS 7 alpha以来,我一直在努力解决这个问题。首先我认为它是alpha上的一个bug,但它仍然在发生,所以我做错了。

在应用程序周围,我正在绘制像细胞背景这样的东西,以及CG,但是在iOS 7中它没有显示。

作为一个例子:

@interface NewManagerCell : UITableViewCell
@end

@implementation NewManagerCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        //some initialization code here
    }
    return self;
}
- (void)drawRect:(CGRect)rect {
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGRect bounds = self.bounds;
    bounds.origin.y += 5; //inter-cell spacing
    bounds.size.height -= 5;

    CGFloat mx = CGRectGetMinX(bounds);
    CGFloat Mx = CGRectGetMaxX(bounds);
    CGFloat my = CGRectGetMinY(bounds);
    CGFloat cy = CGRectGetMinY(bounds)+CGRectGetHeight(bounds)*.375;
    CGFloat My = CGRectGetMaxY(bounds);

    CGContextBeginPath(context);

    CGContextMoveToPoint(context, mx, cy);
    CGContextAddLineToPoint(context, mx+cy-my, my);
    CGContextAddLineToPoint(context, Mx-cy+my, my);
    CGContextAddLineToPoint(context, Mx, cy);
    CGContextAddLineToPoint(context, Mx, My);
    CGContextAddLineToPoint(context, mx, My);
    CGContextAddLineToPoint(context, mx, cy);

    CGContextSetFillColorWithColor(context, [[UIColor colorWithPatternImage:[UIImage imageNamed:@"cell-pattern"]] CGColor]);
    CGContextFillPath(context);

    mx += 4+CGRectGetWidth(bounds)/4-CGRectGetHeight(bounds)*.375/16;
    Mx -= 4;
    my += 4;
    My -= 4;
    cy += 2;

    CGMutablePathRef path = CGPathCreateMutable();

    CGContextBeginPath(context);

    CGPathMoveToPoint(path, &CGAffineTransformIdentity, mx, my);
    CGPathAddLineToPoint(path, &CGAffineTransformIdentity, Mx-(cy-my), my);
    CGPathAddLineToPoint(path, &CGAffineTransformIdentity, Mx, cy);
    CGPathAddLineToPoint(path, &CGAffineTransformIdentity, Mx, My);
    CGPathAddLineToPoint(path, &CGAffineTransformIdentity, mx, My);
    CGPathAddLineToPoint(path, &CGAffineTransformIdentity, mx, my);

    CGContextAddPath(context, path);
    CGContextSetRGBFillColor(context, 1, 1, 1, 1);
    CGContextFillPath(context);

    CGContextAddPath(context, path);
    CGContextSetRGBStrokeColor(context, .69, .69, .69, 1);
    CGContextStrokePath(context);

    CGPathRelease(path);
}
@end

在7之前的任何版本的iOS中工作,现在停止工作。有没有人知道发生了什么?

1 个答案:

答案 0 :(得分:1)

尝试创建包含要绘制的代码的自定义UIView,然后将addSubView添加到单元格的根视图中。