- (void)drawLine{
//view是曲線的背景
viewUIView *view = [[UIView alloc]initWithFrame:CGRectMake(10,0,300,300)];
view.backgroundColor = [UIColor whiteColor];
[self.view addSubview:view];
//第一、UIBezierPath繪制線段
UIBezierPath *path = [UIBezierPath bezierPath];
//四個點
CGPoint point = CGPointMake(10,10);
CGPoint point1 = CGPointMake(200,100);
CGPoint point2 = CGPointMake(240,200);
CGPoint point3 = CGPointMake(290,200);
NSArray *arr = [NSArray arrayWithObjects:[NSValue valueWithCGPoint:point],[NSValue valueWithCGPoint:point1],[NSValue valueWithCGPoint:point2],[NSValue valueWithCGPoint:point3], nil];
NSIndexSet *set= [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, arr.count)];
//第二、就是這句話繪制
[arr enumerateObjectsAtIndexes:setoptions:0usingBlock:^(NSValue *pointValue, NSUInteger idx, BOOL *stop){
CGPoint point = [pointValue CGPointValue];[path addLineToPoint:point];
//（一）rect折線畫法
CGRect rect;
rect.origin.x = point.x -1.5;
rect.origin.y = point.y -1.5;
rect.size.width =4;
rect.size.height =4;
//（二）rect射線畫法
// CGRect rect = CGRectMake(10, 10, 1, 1);
UIBezierPath *arc= [UIBezierPath bezierPathWithOvalInRect:rect];[path appendPath:arc];? ??
}];
//第三很泊、UIBezierPath和CAShapeLayer關(guān)聯(lián)
CAShapeLayer *lineLayer = [CAShapeLayer layer];? ?
?lineLayer.frame = CGRectMake(0,150,320,400);? ?
?lineLayer.fillColor = [UIColor redColor].CGColor;? ?
?lineLayer.path = path.CGPath;? ?
?lineLayer.strokeColor = [UIColor redColor].CGColor;? ?
?[view.layer addSublayer:lineLayer];
//以下代碼為附加的//（一）像一個幕布一樣拉開心软，顯得有動畫
UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0,100,320,400)];? ??
view1.backgroundColor = [UIColor whiteColor]; ??
[self.view addSubview:view1];? ? ? ?
?[UIView animateWithDuration:5animations:^{
view1.frame = CGRectMake(320,100,320,400);? ?
?}]; }
