显示脉冲效果的PulsingView

不念不忘少年蓝@ 2022-01-26 12:37 195阅读 0赞

显示脉冲效果的PulsingView

![311526227379300.gif][]

效果如下:

![311526386902560.gif][]

源码:

PulsingView.h 与 PulsingView.m

//
    //  PulsingView.h
    //  PulsingView
    //
    //  Created by YouXianMing on 14/10/29.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface PulsingView : UIView
    
    /**
     *  startScale与endScale需要设置值
     */
    @property (nonatomic, assign) CGFloat  startScale;
    @property (nonatomic, assign) CGFloat  endScale;
    
    /**
     *  动画时间
     */
    @property (nonatomic, assign) NSTimeInterval duration;
    
    /**
     *  最高程度的alpha
     */
    @property (nonatomic, assign) CGFloat  maxAlpha;
    
    /**
     *  用来做动画的view
     */
    @property (nonatomic, strong) UIView  *inputView;
    
    /**
     *  做动画
     */
    - (void)startAnimation;
    
    @end

//
    //  PulsingView.m
    //  PulsingView
    //
    //  Created by YouXianMing on 14/10/29.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import "PulsingView.h"
    
    @interface PulsingView ()
    
    @end
    
    @implementation PulsingView
    
    - (void)startAnimation {
        CGFloat tmpStartScale = (_startScale < 0 ? 0.5 : _startScale);
        CGFloat tmpEndScale   = (_endScale < 0 ? 2 : _endScale);
        
        _inputView.transform  = CGAffineTransformMake(tmpStartScale, 0, 0, tmpStartScale, 0, 0);
        _inputView.alpha      = ((_maxAlpha <= 0 || _maxAlpha > 1) ? 1: _maxAlpha);
        
        [UIView animateWithDuration:(_duration <= 0 ? 1.f : _duration)
                              delay:0.f options:UIViewAnimationOptionCurveEaseOut animations:^{
                                  _inputView.transform = CGAffineTransformMake(tmpEndScale, 0, 0, tmpEndScale, 0, 0);
                                  _inputView.alpha     = 0.f;
                              } completion:nil];
    }
    
    @synthesize inputView = _inputView;
    - (void)setInputView:(UIView *)inputView {
        _inputView       = inputView;
        inputView.frame  = inputView.bounds; // 重设inputView的frame值
        self.bounds      = inputView.bounds; // 重设view的bounds
        
        // 先删除掉所有的子view
        [[self subviews] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            UIView *tmp = (UIView *)obj;
            [tmp removeFromSuperview];
        }];
        
        [self addSubview:inputView];
    }
    - (UIView *)inputView {
        return _inputView;
    }
    
    @end

使用:

//
    //  ViewController.m
    //  PulsingView
    //
    //  Created by YouXianMing on 14/10/29.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "PulsingView.h"
    #import "YXGCD.h"
    
    @interface ViewController ()
    
    @property (nonatomic, strong) NSTimer     *timer;
    @property (nonatomic, strong) PulsingView *pulsingView;
    @property (nonatomic, strong) UIView      *circleView;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // 设置背景
        self.view.backgroundColor      = [UIColor blackColor];
     
        // 用来显示的view
        _circleView                    = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        _circleView.backgroundColor    = [self randomColor];
        _circleView.layer.cornerRadius = 50.f;
        
        // 脉冲view
        _pulsingView            = [PulsingView new];
        _pulsingView.inputView  = _circleView;
        _pulsingView.startScale = 0.1f;
        _pulsingView.duration   = 1.f;
        _pulsingView.center     = self.view.center;
        [self.view addSubview:_pulsingView];
        
        // 定时器
        _timer = [NSTimer scheduledTimerWithTimeInterval:1.2f
                                                  target:self
                                                selector:@selector(animationTimerEvent)
                                                userInfo:nil
                                                 repeats:YES];
    }
    
    - (void)animationTimerEvent {
        _circleView.backgroundColor = [self randomColor];
        _pulsingView.endScale       = arc4random()%200/100.f + 1.f;
        [_pulsingView startAnimation];
    }
    
    - (UIColor *)randomColor {
        return [UIColor colorWithRed:arc4random()%255/255.f
                               green:arc4random()%255/255.f
                                blue:arc4random()%255/255.f
                               alpha:1.f];
    }
    
    @end

类的详细细节:

![311529550504999.png][]

[311526227379300.gif]: /images/20220126/a2632da6c259469e9e53669e3fd5a38e.png
[311526386902560.gif]: /images/20220126/756b0def731c42cc999aef48f5042166.png
[311529550504999.png]: /images/20220126/9d4584ef05ab45f1bfb0e69e95288937.png