在家閑來無事，于是就看起來ios繪圖的那塊，寫點(diǎn)什么好呢？

鼓搗了一會(huì)，總算寫出了一個(gè)小東西

這個(gè)是寫完以后的效果

image

image

image

這里我實(shí)現(xiàn)了三種款式的alertview
分別是成功，錯(cuò)誤和警告，剩下的呢有空繼續(xù)添加吧。

廢話不說了，講一下代碼的思路

我用的是UIBezierPath進(jìn)行繪圖

ios有很多種繪圖的方式，要講的話在寫幾篇都寫不完，這里就不詳細(xì)介紹了。

UIBezierPath繪圖分三個(gè)步驟

1.創(chuàng)建UIBezierPath路徑
2.創(chuàng)建CAShapeLayer
3.將layer附加到圖層

2和3之間還可以添加動(dòng)畫

[_logoView removeFromSuperview];
    _logoView = [[UIView alloc] initWithFrame:CGRectMake(([self getSelfSize].width-Simble_SIZE)/2, Simble_TOP, Simble_SIZE, Simble_SIZE)];
    
    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(Simble_SIZE/2, Simble_SIZE/2) radius:Simble_SIZE/2 startAngle:0 endAngle:M_PI*2 clockwise:YES];
    path.lineCapStyle = kCGLineCapRound;
    path.lineJoinStyle = kCGLineCapRound;
    
    [path moveToPoint:CGPointMake(Simble_SIZE/2, Simble_SIZE/6)];
    CGPoint p1 = CGPointMake(Simble_SIZE/2, Simble_SIZE/6*3.8);
    [path addLineToPoint:p1];
    
    [path moveToPoint:CGPointMake(Simble_SIZE/2, Simble_SIZE/6*4.5)];
    [path addArcWithCenter:CGPointMake(Simble_SIZE/2, Simble_SIZE/6*4.5) radius:2 startAngle:0 endAngle:M_PI*2 clockwise:YES];
    
    
    CAShapeLayer *layer = [[CAShapeLayer alloc] init];
    layer.fillColor = [UIColor clearColor].CGColor;
    layer.strokeColor = [UIColor orangeColor].CGColor;
    layer.lineWidth = 5;
    layer.path = path.CGPath;
    
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:NSStringFromSelector(@selector(strokeEnd))];
    animation.fromValue = @0;
    animation.toValue = @1;
    animation.duration = 0.5;
    [layer addAnimation:animation forKey:NSStringFromSelector(@selector(strokeEnd))];
    
    [_logoView.layer addSublayer:layer];
    
    [self addSubview:_logoView];

這個(gè)代碼段是用來繪制一個(gè)嘆號(hào)

GitHub代碼在這