POP数值动画

POP数值动画

效果

源码

https://github.com/YouXianMing/Animations

//

//  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(, , , )];

    _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:.f];

    [self.timer start];

}

- (void)configNumberAnimation {

    self.numberAnimation.fromValue      = self.numberAnimation.currentValue;

    self.numberAnimation.toValue        = (arc4random() %  / .f);

    self.numberAnimation.duration       = .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(, totalString.length);

    // Init attributes.

    FontAttribute *totalFont = [FontAttribute new];

    totalFont.font           = Font_Avenir_Light(.f);

    totalFont.effectRange    = totalRange;

    FontAttribute *numberFont = [FontAttribute new];

    numberFont.font           = Font_HYQiHei(.f);

    numberFont.effectRange    = numberRange;

    ForegroundColorAttribute *totalColor = [ForegroundColorAttribute new];

    totalColor.color                     = [UIColor blackColor];

    totalColor.effectRange               = totalRange;

    ForegroundColorAttribute *mpsColor   = [ForegroundColorAttribute new];

    mpsColor.color                       = [self mpsColorWithValue:currentValue / .f];

    mpsColor.effectRange                 = mpsRange;

    ForegroundColorAttribute *numColor   = [ForegroundColorAttribute new];

    numColor.color                       = [self numColorWithValue:currentValue / .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: blue: alpha:.f];

}

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

    return [UIColor colorWithRed: green:value / .f blue:value / .f alpha:value];

}

@end

细节