创建90度扇形坐标数组
- (NSArray *)creatPointArrayWithNumber:(NSInteger)number point:(CGPoint)point r:(CGFloat)r {
NSMutableArray *array = [NSMutableArray array];
CGFloat f = M_PI_2/(number-1);
for (int i = 0; i < number; i ++) {
CGFloat y = r * cos(f * i);
CGFloat x = r * sin(f * i);
CGPoint newPoint = CGPointMake(point.x - x, point.y - y);
NSString *pointStr = NSStringFromCGPoint(newPoint);
[array addObject:pointStr];
}
return array;
//得到point:CGPointFromString(array[0]);
}
要展开的时候将扇形坐标赋值给子控件
消失的时候将消失坐标赋值给子控件
