POP数值动画

//
//  PopNumberController.m
//  Animations
//
//  Created by YouXianMing on 15/11/18.
//  Copyright © 2015年 YouXianMing. All rights reserved.
//

#import "PopNumberController.h"
#import "POPNumberAnimation.h"
#import "GCD.h"
#import "StringAttributeHelper.h"

@interface PopNumberController () <POPNumberAnimationDelegate>

@property (nonatomic, strong) POPNumberAnimation *numberAnimation;
@property (nonatomic, strong) GCDTimer           *timer;
@property (nonatomic, strong) UILabel            *label;

@end

@implementation PopNumberController

- (void)viewDidLoad {

[super viewDidLoad];
}

- (void)setup {

[super setup];

_label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 250, 250)];
_label.textAlignment = NSTextAlignmentCenter;
_label.center        = self.view.center;
[self.view addSubview:_label];

// Init numberAnimation.
self.numberAnimation          = [[POPNumberAnimation alloc] init];
self.numberAnimation.delegate = self;

// Timer event.
__weak PopNumberController *weakSelf = self;
self.timer = [[GCDTimer alloc] initInQueue:[GCDQueue mainQueue]];
[self.timer event:^{

// Start animation.
[weakSelf configNumberAnimation];
[weakSelf.numberAnimation startAnimation];

} timeIntervalWithSecs:3.f];
[self.timer start];
}

- (void)configNumberAnimation {

self.numberAnimation.fromValue      = self.numberAnimation.currentValue;
self.numberAnimation.toValue        = (arc4random() % 101 / 1.f);
self.numberAnimation.duration       = 2.f;
self.numberAnimation.timingFunction = [CAMediaTimingFunction functionWithControlPoints:0.69 :0.11 :0.32 :0.88];
[self.numberAnimation saveValues];
}

- (void)POPNumberAnimation:(POPNumberAnimation *)numberAnimation currentValue:(CGFloat)currentValue {

// Init string.
NSString *numberString = [NSString stringWithFormat:@"%.1f", currentValue];
NSString *mpsString    = @"mps";
NSString *totalString  = [NSString stringWithFormat:@"%@ %@", numberString, mpsString];

// Init string ranges.
NSRange   mpsRange     = [totalString rangeOfString:mpsString];
NSRange   numberRange  = [totalString rangeOfString:numberString];
NSRange   totalRange   = NSMakeRange(0, totalString.length);

// Init attributes.
FontAttribute *totalFont = [FontAttribute new];
totalFont.font           = Font_Avenir_Light(20.f);
totalFont.effectRange    = totalRange;

FontAttribute *numberFont = [FontAttribute new];
numberFont.font           = Font_HYQiHei(60.f);
numberFont.effectRange    = numberRange;

ForegroundColorAttribute *totalColor = [ForegroundColorAttribute new];
totalColor.color                     = [UIColor blackColor];
totalColor.effectRange               = totalRange;

ForegroundColorAttribute *mpsColor   = [ForegroundColorAttribute new];
mpsColor.color                       = [self mpsColorWithValue:currentValue / 100.f];
mpsColor.effectRange                 = mpsRange;

ForegroundColorAttribute *numColor   = [ForegroundColorAttribute new];
numColor.color                       = [self numColorWithValue:currentValue / 100.f];
numColor.effectRange                 = numberRange;

// Create richString.
NSMutableAttributedString *richString = [[NSMutableAttributedString alloc] initWithString:totalString];
[richString addStringAttribute:totalFont];
[richString addStringAttribute:totalColor];
[richString addStringAttribute:numberFont];
[richString addStringAttribute:mpsColor];
[richString addStringAttribute:numColor];

_label.attributedText = richString;
}

- (UIColor *)numColorWithValue:(CGFloat)value {

return [UIColor colorWithRed:value green:0 blue:0 alpha:1.f];
}

- (UIColor *)mpsColorWithValue:(CGFloat)value {

return [UIColor colorWithRed:0 green:value / 2.f blue:value / 3.f alpha:value];
}

@end