我能够在我的应用程序中使用 UIBezierPath 进行绘制。现在我添加了一个 UIColor 变量，以便用户按下按钮可以选择不同的颜色。当用户更改颜色并开始使用新颜色绘制时，所有已绘制的路径都具有新颜色。
如何告诉对象不要更改已绘制路径的颜色？
这是我的代码。非常感谢任何代码示例！:)
（我的 UIColor 变量存储在 appDelegate 中，我正在从另一个 viewControlle 调用刷新方法。
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
AppDelegate *app = (AppDelegate *)[[UIApplication sharedApplication] delegate];
self.backgroundColor = [UIColor whiteColor];
myPath = [[UIBezierPath alloc] init];
myPath.lineCapStyle = kCGLineCapRound;
myPath.miterLimit = 0;
myPath.lineWidth = 5;
brushPattern = app.currentColor;
}
return self;
}
-(void)refresh {
AppDelegate *app = (AppDelegate *)[[UIApplication sharedApplication] delegate];
brushPattern = app.currentColor;
}
- (void)drawRect:(CGRect)rect {
[brushPattern setStroke];
for (UIBezierPath *_path in pathArray)
[_path strokeWithBlendMode:kCGBlendModeNormal alpha:1.0];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
myPath = [[UIBezierPath alloc] init];
myPath.lineWidth = 5;
UITouch *mytouch = [[touches allObjects] objectAtIndex:0];
[myPath moveToPoint:[mytouch locationInView:self]];
[pathArray addObject:myPath];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *mytouch = [[touches allObjects] objectAtIndex:0];
[myPath addLineToPoint:[mytouch locationInView:self]];
[self setNeedsDisplay];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
}