POP缩放动画

POP缩放动画

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效果

源码

https://github.com/YouXianMing/Animations

//// SpringScaleViewController.m// Animations//// Created by YouXianMing on 16/6/3.// Copyright © 2016年 YouXianMing. All rights reserved.//#import "SpringScaleViewController.h"#import "UIView+SetRect.h"#import "UIFont+Fonts.h"#import "GCD.h"#import "POP.h"@interface SpringScaleViewController ()@property (nonatomic, strong) UIView *scaleView;@end@implementation SpringScaleViewController- (void)setup {  [super setup];    // Label  UILabel *label = [[UILabel alloc] init];  label.text   = @"P  P";  label.font   = [UIFont HYQiHeiWithFontSize:140];  [label sizeToFit];  label.center  = self.contentView.middlePoint;  [self.contentView addSubview:label];    // Circle  self.scaleView          = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];  self.scaleView.backgroundColor  = [[UIColor colorWithRed:0.203 green:0.598 blue:0.859 alpha:1] colorWithAlphaComponent:0.95f];  self.scaleView.layer.cornerRadius = self.scaleView.width / 2.f;  self.scaleView.center       = self.contentView.middlePoint;  [self.contentView addSubview:self.scaleView];    // Start animation after 1 second.  [GCDQueue executeInMainQueue:^{        [self scaleAnimation];      } afterDelaySecs:1.f];}- (void)scaleAnimation {  POPBasicAnimation *scaleAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPViewScaleXY];    scaleAnimation.name        = @"scaleSmallAnimation";  scaleAnimation.delegate      = self;    scaleAnimation.duration      = 0.15f;  scaleAnimation.toValue      = [NSValue valueWithCGPoint:CGPointMake(1.25, 1.25)];\    [self.scaleView pop_addAnimation:scaleAnimation forKey:nil];}- (void)pop_animationDidStop:(POPAnimation *)anim finished:(BOOL)finished {  if ([anim.name isEqualToString:@"scaleSmallAnimation"]) {        POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPViewScaleXY];        scaleAnimation.name        = @"SpringAnimation";    scaleAnimation.delegate      = self;        scaleAnimation.toValue       = [NSValue valueWithCGPoint:CGPointMake(1, 1)];    scaleAnimation.velocity      = [NSValue valueWithCGPoint:CGPointMake(-2, -2)];    scaleAnimation.springBounciness  = 20.f;    scaleAnimation.springSpeed     = 10.f;    scaleAnimation.dynamicsTension   = 700.f;    scaleAnimation.dynamicsFriction  = 7.f;    scaleAnimation.dynamicsMass    = 3.f;        [self.scaleView pop_addAnimation:scaleAnimation forKey:nil];      } else if ([anim.name isEqualToString:@"SpringAnimation"]) {      [self performSelector:@selector(scaleAnimation) withObject:nil afterDelay:1];  }}- (void)viewWillDisappear:(BOOL)animated {  [super viewWillDisappear:animated];    [[self class] cancelPreviousPerformRequestsWithTarget:self];}@end

细节

1. 参数设置有技巧，可以参考如下所示（项目中的POPSpringParameterController）：

2. 动画效果是通过组合两个动画而来的，要注意设置代理：

原标题：POP缩放动画

关键词：