POP縮放動畫，pop縮放

POP縮放動畫，pop縮放

POP縮放動畫

 

效果

 

源碼

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

 

細節

1. 參數設定有技巧，可以參考如下所示（項目中的POPSpringParameterController）：

2. 動畫效果是通過組合兩個動畫而來的，要注意設定代理：