POP动画[3]

时间：2014-07-16 20:54:35 阅读：175 评论：0 收藏：0 [点我收藏+]

标签：style blog http color 使用 2014

POP动画[3]

bubuko.com,布布扣

这一节主要讲解POP动画的自定义动画属性.

POP动画中有一个参数,叫timingFunction,与CoreAnimation中的一个参数CAMediaTimingFunction基本一样,下图表示的是kCAMediaTimingFunctionEaseInEaseOut的曲线图.

bubuko.com,布布扣

下图是Spring动画效果:

bubuko.com,布布扣

我们可以使用自定义的属性来实现POP的库中没有提供的动画.

实现的效果:

bubuko.com,布布扣

源码:

//
//  RootViewController.m
//  YXPOP
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "RootViewController.h"
#import "POP.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor   = [UIColor blackColor];
    
    // 数值型label
    UILabel *numberLabel        = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];
    numberLabel.center                 = self.view.center;
    numberLabel.userInteractionEnabled = YES;
    numberLabel.textAlignment          = NSTextAlignmentCenter;
    numberLabel.textColor       = [UIColor redColor];
    numberLabel.text            = @"0";
    numberLabel.font            = [UIFont fontWithName:@"HelveticaNeue-UltraLight"
                                                  size:50.f];
    [self.view addSubview:numberLabel];
    
    // 添加手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                          action:@selector(tap:)];
    [numberLabel addGestureRecognizer:tap];

}

- (void)tap:(UITapGestureRecognizer *)tap
{
    UILabel *tmp                  = (UILabel *)tap.view;
    POPBasicAnimation *animation  = [POPBasicAnimation animation];
    animation.fromValue           = @([tmp.text intValue]);
    animation.toValue             = @(arc4random()%10000 + 2000);
    animation.duration            = 1.f;
    
    // 计算从fromValue到toValue插值的曲线
    animation.timingFunction      =         [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    // 将计算出来的值通过writeBlock动态给控件设定
    animation.property            =         [POPMutableAnimatableProperty propertyWithName:@"textLabel" initializer:^(POPMutableAnimatableProperty *prop) {
         prop.writeBlock      = ^(id obj, const CGFloat values[]) {
             UILabel *label   = (UILabel *)obj;
             NSNumber *number = @(values[0]);
             int num          = [number intValue];
             label.text       = [@(num) stringValue];
         };
     }];
    
    
    [tmp pop_addAnimation:animation forKey:@"numberLabelAnimation"];
}

@end