Created
April 20, 2017 06:01
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// @property (nonatomic, strong) NSArray *colors; | |
// macro from https://gist.github.com/uechi/7688152 | |
//RGB color macro | |
#define UIColorFromRGB(rgbValue) [UIColor \ | |
colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \ | |
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \ | |
blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0] | |
//RGB color macro with alpha | |
#define UIColorFromRGBWithAlpha(rgbValue,a) [UIColor \ | |
colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \ | |
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \ | |
blue:((float)(rgbValue & 0xFF))/255.0 alpha:a] | |
// Usage | |
// UIColorFromRGB(0xCECECE); | |
// UIColorFromRGBWithAlpha(0xCECECE, 0.8); | |
- (UIColor *)randomColor | |
{ | |
if (!_colors) { | |
_colors = @[ | |
UIColorFromRGB(0xff7f7f), | |
UIColorFromRGB(0xff7fbf), | |
UIColorFromRGB(0xff7fff), | |
UIColorFromRGB(0xbf7fff), | |
UIColorFromRGB(0x7f7fff), | |
UIColorFromRGB(0x7fbfff), | |
UIColorFromRGB(0x7fffff), | |
UIColorFromRGB(0x7fffbf), | |
UIColorFromRGB(0x7fff7f), | |
UIColorFromRGB(0xbfff7f), | |
UIColorFromRGB(0xffff7f), | |
UIColorFromRGB(0xffbf7f) | |
]; | |
} | |
NSInteger count = _colors.count; | |
NSInteger r = arc4random() % count; | |
return _colors[r]; | |
} | |
- (void)rippleWithView:(UIView *)view center:(CGPoint)center colorFrom:(UIColor *)colorFrom colorTo:(UIColor *)colorTo | |
{ | |
if (!view) { | |
return; | |
} | |
CGFloat radius = 40.0f; | |
UIView *ripple = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, radius, radius)]; | |
ripple.layer.cornerRadius = radius * 0.5f; | |
ripple.backgroundColor = colorFrom; | |
ripple.alpha = 1.0f; | |
[view insertSubview:ripple atIndex:0]; | |
ripple.center = center; | |
CGFloat scale = 8.0f; | |
[UIView animateWithDuration:0.6f delay:0.0f options:UIViewAnimationOptionCurveEaseOut animations:^{ | |
ripple.transform = CGAffineTransformMakeScale(scale, scale); | |
ripple.alpha = 0.0f; | |
ripple.backgroundColor = colorTo; | |
} completion:^(BOOL finished) { | |
[ripple removeFromSuperview]; | |
}]; | |
} | |
// Usage | |
// [self rippleWithView:view center:view.center colorFrom:[self randomColor] colorTo:[self randomColor]]; |
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