我在旋转 UIView 时遇到了一个问题。
我有一个名为“updatePositions”的方法，它将视图的当前帧设置为超级视图的左侧或右侧，然后调用旋转函数来旋转整个 UIView。但是，当我调用它时，框架设置得很好，但是旋转完全破坏了视图。
在我的布局子视图中，我创建了一个标签和贝塞尔路径，每个标签仅在标签不存在时创建，并且使用视图的 bounds 属性进行布局。
我在错误的地方调用 CGAffineTransformMakeRotation 吗？
- (void)updatePosition
{
// If the join overview orientates to north set position
if (self.joinOverview.doesOrientateToNorth)
// If the approach track is not south west place the north indicator in the lower left of the diagram
// if approach track is south west place north indicator in lower right
if (self.joinOverview.dataItem.approachTrack != VDApproachTrackSouthWest)
[self setFrame:CGRectMake(-self.superview.frame.origin.x, self.superview.frame.size.height - VIEW_SIZE, VIEW_SIZE, VIEW_SIZE)];
else
[self setFrame:CGRectMake(self.superview.frame.size.width - VIEW_SIZE, self.superview.frame.size.height - VIEW_SIZE, VIEW_SIZE, VIEW_SIZE)];
}
else // If the join overview orientates to the approach track set rotation and position
{
// Set the position to the lower left of the view
[self setFrame:CGRectMake(-self.superview.frame.origin.x, self.superview.frame.size.height - VIEW_SIZE, VIEW_SIZE, VIEW_SIZE)];
// Rotate
self.transform = CGAffineTransformMakeRotation(DegreesToRadians(50));
}
}
- (void)layoutSubviews
{
// Super
[super layoutSubviews];
// set background colour to transparent
self.backgroundColor = [UIColor clearColor];
if (!self.northSymbol) {
// Add 'N' symbol label
self.northSymbol = [[UILabel alloc]initWithFrame:CGRectMake(0, self.bounds.size.height / 2, self.bounds.size.width, self.bounds.size.height / 2)];
[self.northSymbol setText:@"N"];
[self.northSymbol setTextAlignment:NSTextAlignmentCenter];
[self.northSymbol setFont:[UIFont boldSystemFontOfSize:18]];
[self addSubview:self.northSymbol];
self.arrow = [UIBezierPath bezierPathWithThreePointArrowFromPoint:CGPointMake(self.bounds.size.width / 2, self.bounds.size.height / 2)
toPoint:CGPointMake(self.bounds.size.width / 2, self.bounds.size.height / 20)
headWidth:self.bounds.size.width / 2.5];
}
}