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[翻译] JTNumberScrollAnimatedView

2024-08-09 04:27:00   211人阅读

JTNumberScrollAnimatedView

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Use JTNumberScrollAnimatedView for have a nice animation for display number. It‘s easy to use, easy to customize.

使用 JTNumberScrollAnimatedView来展示一个效果非常不错的显示数字变化的动画效果的控件，使用很简单，非常容易定制。

 

Usage

 

Basic usage - 基本的使用

You can use JTNumberScrollAnimatedView like a normal view.

你可以像使用一个普通的view一样来使用JTNumberScrollAnimatedView

#import <UIKit/UIKit.h>#import "JTNumberScrollAnimatedView.h"@interface ViewController : UIViewController@property (weak, nonatomic) IBOutlet JTNumberScrollAnimatedView *animatedView;@end

You just have to call setValue with a NSNumber and use startAnimation for launch the animation.

你只需要调用setValue方法然后执行startAnimation方法就能显示效果。

- (void)viewDidLoad{    [super viewDidLoad];    [self.animatedView setValue:@249];}- (void)viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];    [self.animatedView startAnimation];}

 

WARNING - 注意

For now the value must be a positive integer.

现在，这个值必须是正的不能是负数。

 

Customization - 定制

You can easily change some properties of the animation. Each caracter have its own column.

你可以很简单的修改以下的一些属性

  • textColor
  • font
  • duration
  • durationOffset, delay between the end of the animation of each column
  • density, number of characters by column for the animation
  • minLength, you can force the minimum count of columns
  • isAscending, the direction of the scroll

If you change one of this properties, you have to call setValue for update the view.

如果你修改了其中的一个属性，你需要调用 setValue 来更新画面。

 

Requirements

  • iOS 7 or higher                                 iOS7 或者更高版本
  • Automatic Reference Counting (ARC)  ARC
////  JTNumberScrollAnimatedView.h//  JTNumberScrollAnimatedView////  Created by Jonathan Tribouharet//#import <UIKit/UIKit.h>@interface JTNumberScrollAnimatedView : UIView@property (strong, nonatomic) NSNumber *value;@property (strong, nonatomic) UIColor *textColor;@property (strong, nonatomic) UIFont *font;@property (assign, nonatomic) CFTimeInterval duration;@property (assign, nonatomic) CFTimeInterval durationOffset;@property (assign, nonatomic) NSUInteger density;@property (assign, nonatomic) NSUInteger minLength;@property (assign, nonatomic) BOOL isAscending;- (void)startAnimation;- (void)stopAnimation;@end
////  JTNumberScrollAnimatedView.m//  JTNumberScrollAnimatedView////  Created by Jonathan Tribouharet//#import "JTNumberScrollAnimatedView.h"@interface JTNumberScrollAnimatedView(){    NSMutableArray *numbersText;    NSMutableArray *scrollLayers;    NSMutableArray *scrollLabels;}@end@implementation JTNumberScrollAnimatedView- (instancetype)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if(!self){        return nil;    }        [self commonInit];        return self;}- (id)initWithCoder:(NSCoder *)aDecoder{    self = [super initWithCoder:aDecoder];    if(!self){        return nil;    }        [self commonInit];        return self;}- (void)commonInit{    self.duration = 1.5;    self.durationOffset = .2;    self.density = 5;    self.minLength = 0;    self.isAscending = NO;        self.font = [UIFont systemFontOfSize:[UIFont systemFontSize]];    self.textColor = [UIColor blackColor];        numbersText = [NSMutableArray new];    scrollLayers = [NSMutableArray new];    scrollLabels = [NSMutableArray new];}- (void)setValue:(NSNumber *)value{    self->_value =http://www.mamicode.com/ value;        [self prepareAnimations];}- (void)startAnimation{    [self prepareAnimations];    [self createAnimations];}- (void)stopAnimation{    for(CALayer *layer in scrollLayers){        [layer removeAnimationForKey:@"JTNumberScrollAnimatedView"];    }}- (void)prepareAnimations{    for(CALayer *layer in scrollLayers){        [layer removeFromSuperlayer];    }        [numbersText removeAllObjects];    [scrollLayers removeAllObjects];    [scrollLabels removeAllObjects];        [self createNumbersText];    [self createScrollLayers];}- (void)createNumbersText{    NSString *textValue =http://www.mamicode.com/ [self.value stringValue];        for(NSInteger i = 0; i < (NSInteger)self.minLength - (NSInteger)[textValue length]; ++i){        [numbersText addObject:@"0"];    }        for(NSUInteger i = 0; i < [textValue length]; ++i){        [numbersText addObject:[textValue substringWithRange:NSMakeRange(i, 1)]];    }}- (void)createScrollLayers{    CGFloat width = roundf(CGRectGetWidth(self.frame) / numbersText.count);    CGFloat height = CGRectGetHeight(self.frame);        for(NSUInteger i = 0; i < numbersText.count; ++i){        CAScrollLayer *layer = [CAScrollLayer layer];        layer.frame = CGRectMake(roundf(i * width), 0, width, height);        [scrollLayers addObject:layer];        [self.layer addSublayer:layer];    }        for(NSUInteger i = 0; i < numbersText.count; ++i){        CAScrollLayer *layer = scrollLayers[i];        NSString *numberText = numbersText[i];        [self createContentForLayer:layer withNumberText:numberText];    }}- (void)createContentForLayer:(CAScrollLayer *)scrollLayer withNumberText:(NSString *)numberText{    NSInteger number = [numberText integerValue];    NSMutableArray *textForScroll = [NSMutableArray new];        for(NSUInteger i = 0; i < self.density + 1; ++i){        [textForScroll addObject:[NSString stringWithFormat:@"%ld", (number + i) % 10]];    }        [textForScroll addObject:numberText];    if(!self.isAscending){        textForScroll = [[[textForScroll reverseObjectEnumerator] allObjects] mutableCopy];    }        CGFloat height = 0;    for(NSString *text in textForScroll){        UILabel * textLabel = [self createLabel:text];        textLabel.frame = CGRectMake(0, height, CGRectGetWidth(scrollLayer.frame), CGRectGetHeight(scrollLayer.frame));        [scrollLayer addSublayer:textLabel.layer];        [scrollLabels addObject:textLabel];        height = CGRectGetMaxY(textLabel.frame);    }}- (UILabel *)createLabel:(NSString *)text{    UILabel *view = [UILabel new];        view.textColor = self.textColor;    view.font = self.font;    view.textAlignment = NSTextAlignmentCenter;        view.text = text;        return view;}- (void)createAnimations{    CFTimeInterval duration = self.duration - ([numbersText count] * self.durationOffset);    CFTimeInterval offset = 0;        for(CALayer *scrollLayer in scrollLayers){        CGFloat maxY = [[scrollLayer.sublayers lastObject] frame].origin.y;                CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"sublayerTransform.translation.y"];        animation.duration = duration + offset;        animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];                if(self.isAscending){            animation.fromValue = [NSNumber numberWithFloat:-maxY];            animation.toValue = @0;        }        else{            animation.fromValue = @0;            animation.toValue = [NSNumber numberWithFloat:-maxY];        }                [scrollLayer addAnimation:animation forKey:@"JTNumberScrollAnimatedView"];                offset += self.durationOffset;    }}@end

 

[翻译] JTNumberScrollAnimatedView


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