我想爲每個支架添加標籤。我得到「Reciever類型」繪製2D「(我的類),例如消息沒有聲明第二行到最後一行的選擇器'addSubView'的方法。並且我得到了「ARC禁止顯式發送'release'消息」的最後一行。添加UILabel查看objective-c
這裏是我的代碼:
for (int i = 0; i < 4; i++) {
CGFloat bracketStartX = 50;
CGFloat bracketEndX = 200;
CGFloat bracketStartY = 25 + (i * height/4);
CGFloat bracketEndY = 80 + (i * height/4);
CGContextMoveToPoint(context, bracketStartX, bracketStartY);
//make bracket
CGContextAddLineToPoint(context, bracketEndX, bracketStartY);
CGContextAddLineToPoint(context, bracketEndX, bracketEndY);
CGContextAddLineToPoint(context, bracketStartX, bracketEndY);
CGContextMoveToPoint(context, bracketEndX, (bracketEndY + bracketStartY)/2);
CGContextAddLineToPoint(context, bracketEndX + 50, (bracketEndY + bracketStartY)/2);
UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(bracketStartX + 5, bracketStartY - 5, 20, 15)];
label.text = @"text"; //etc...
[self addSubView:label];
[label release];
}
感謝。