iOS-启动动态页跳过设计思路

红太狼 2022-05-31 09:53 241阅读 0赞

# 概述 #

根据UIBezierPath和CAShapeLayer自定义倒计时进度条，适用于app启动的时候设置一个倒计时关闭启动页面。可以设置进度条颜色，填充颜色，进度条宽度以及点击事件等。

# 详细 #

#### 代码下载：[http://www.demodashi.com/demo/10700.html][http_www.demodashi.com_demo_10700.html] ####

我们都知道 APP启动时加载的是LaunchImage 这张静态图。现在好多应用启动时都是动态的,并且右上角可选择跳过。

![动态启动页 下午7.34.54.gif][_7.34.54.gif]

这里介绍一下自己在做这种动画时的一种方案。

启动图依然是加载的，只不过是一闪而过，这时候我想到的是拿到当前的LaunchImage图片，然后进行处理，造成一种改变了LaunchImage动画的假象。

思路如下:

#### 一、设置跳过按钮 ####

ZLDrawCircleProgressBtn.h:

/**
     *  set complete callback
     *
     *  @param lineWidth line width
     *  @param block     block
     *  @param duration  time
     */
    - (void)startAnimationDuration:(CGFloat)duration withBlock:(DrawCircleProgressBlock )block;

ZLDrawCircleProgressBtn.m :

先初始化相关跳过按钮及进度圈:

// 底部进度条圈
    @property (nonatomic, strong) CAShapeLayer *trackLayer;
    // 表层进度条圈
    @property (nonatomic, strong) CAShapeLayer *progressLayer;
    @property (nonatomic, strong) UIBezierPath *bezierPath;
    @property (nonatomic, copy)   DrawCircleProgressBlock myBlock;

- (instancetype)initWithFrame:(CGRect)frame
    {
        if (self == [super initWithFrame:frame]) {
            self.backgroundColor = [UIColor clearColor];
            
            [self.layer addSublayer:self.trackLayer];
            
        }
        return self;
    }

- (UIBezierPath *)bezierPath {
        if (!_bezierPath) {
            
            CGFloat width = CGRectGetWidth(self.frame)/2.0f;
            CGFloat height = CGRectGetHeight(self.frame)/2.0f;
            CGPoint centerPoint = CGPointMake(width, height);
            float radius = CGRectGetWidth(self.frame)/2;
            
            _bezierPath = [UIBezierPath bezierPathWithArcCenter:centerPoint
                                                         radius:radius
                                                     startAngle:degreesToRadians(-90)
                                                       endAngle:degreesToRadians(270)
                                                      clockwise:YES];
        }
        return _bezierPath;
    }

底部进度条圈:

- (CAShapeLayer *)trackLayer {
        if (!_trackLayer) {
            _trackLayer = [CAShapeLayer layer];
            _trackLayer.frame = self.bounds;
            // 圈内填充色
            _trackLayer.fillColor = self.fillColor.CGColor ? self.fillColor.CGColor : [UIColor clearColor].CGColor ;
            _trackLayer.lineWidth = self.lineWidth ? self.lineWidth : 2.f;
            // 底部圈色
            _trackLayer.strokeColor = self.trackColor.CGColor ? self.trackColor.CGColor : [UIColor colorWithRed:197/255.0 green:159/255.0 blue:82/255.0 alpha:0.3].CGColor ;
            _trackLayer.strokeStart = 0.f;
            _trackLayer.strokeEnd = 1.f;
            
            _trackLayer.path = self.bezierPath.CGPath;
        }
        return _trackLayer;
    }

表层进度条圈:

- (CAShapeLayer *)progressLayer {
        
        if (!_progressLayer) {
            _progressLayer = [CAShapeLayer layer];
            _progressLayer.frame = self.bounds;
            _progressLayer.fillColor = [UIColor clearColor].CGColor;
            _progressLayer.lineWidth = self.lineWidth ? self.lineWidth : 2.f;
            _progressLayer.lineCap = kCALineCapRound;
            // 进度条圈进度色
            _progressLayer.strokeColor = self.progressColor.CGColor ? self.progressColor.CGColor  : [UIColor  colorWithRed:197/255.0 green:159/255.0 blue:82/255.0 alpha:1].CGColor;
            _progressLayer.strokeStart = 0.f;
            
            CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
            pathAnimation.duration = self.animationDuration;
            pathAnimation.fromValue = @(0.0);
            pathAnimation.toValue = @(1.0);
            pathAnimation.removedOnCompletion = YES;
            pathAnimation.delegate = self;
            [_progressLayer addAnimation:pathAnimation forKey:nil];
            
            _progressLayer.path = _bezierPath.CGPath;
        }
        return _progressLayer;
    }

设置代理回调:

#pragma mark -- CAAnimationDelegate
    - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
        if (flag) {
            self.myBlock();
        }
    }
    #pragma mark ---
    - (void)startAnimationDuration:(CGFloat)duration withBlock:(DrawCircleProgressBlock )block {
        self.myBlock = block;
        self.animationDuration = duration;
        [self.layer addSublayer:self.progressLayer];
    }

#### 二、启动页 ####

ZLStartPageView.h :

露出 显示引导页面方法:

/**
     *  显示引导页面方法
     */
    - (void)show;

ZLStartPageView.m :

1.  初始化启动页

// 启动页图
    @property (nonatomic,strong) UIImageView *imageView;
    // 跳过按钮
    @property (nonatomic, strong) ZLDrawCircleProgressBtn *drawCircleBtn;

- (instancetype)initWithFrame:(CGRect)frame {
        
        if (self = [super initWithFrame:frame]) {
            
            // 1.启动页图片
            _imageView = [[UIImageView alloc]initWithFrame:frame];
            _imageView.contentMode = UIViewContentModeScaleAspectFill;
            _imageView.image = [UIImage imageNamed:@"LaunchImage_667h"];
            [self addSubview:_imageView];
            
            // 2.跳过按钮
            ZLDrawCircleProgressBtn *drawCircleBtn = [[ZLDrawCircleProgressBtn alloc]initWithFrame:CGRectMake(kscreenWidth - 55, 30, 40, 40)];
            drawCircleBtn.lineWidth = 2;
            [drawCircleBtn setTitle:@"跳过" forState:UIControlStateNormal];
            [drawCircleBtn setTitleColor:[UIColor  colorWithRed:197/255.0 green:159/255.0 blue:82/255.0 alpha:1] forState:UIControlStateNormal];
            drawCircleBtn.titleLabel.font = [UIFont systemFontOfSize:14];
            
            [drawCircleBtn addTarget:self action:@selector(removeProgress) forControlEvents:UIControlEventTouchUpInside];
            [self addSubview:drawCircleBtn];
            self.drawCircleBtn = drawCircleBtn;
            
        }
        return self;
    }

2. 显示启动页且完成时候回调移除

- (void)show {
        //  progress 完成时候的回调
        __weak __typeof(self) weakSelf = self;
        [weakSelf.drawCircleBtn startAnimationDuration:showtime withBlock:^{
            [weakSelf removeProgress];
        }];
        
        UIWindow *window = [UIApplication sharedApplication].keyWindow;
        [window addSubview:self];
    }

3. 移除启动页面

- (void)removeProgress {
        
        self.imageView.transform = CGAffineTransformMakeScale(1, 1);
        self.imageView.alpha = 1;
        
        [UIView animateWithDuration:0.3 animations:^{
            self.drawCircleBtn.hidden = NO;
            self.imageView.alpha = 0.05;
            self.imageView.transform = CGAffineTransformMakeScale(5, 5);
        } completion:^(BOOL finished) {
            
            self.drawCircleBtn.hidden = YES;
            [self.imageView removeFromSuperview];
        }];
    }

#### 三、动态启动页的显示代码放在AppDeleate中 ####

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        
        self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
        self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[[HomeViewController alloc] init]];
        [self.window makeKeyAndVisible];
        
        [self setupStartPageView];
        
        return YES;
    }

设置启动页:

- (void)setupStartPageView {
        
        ZLStartPageView *startPageView = [[ZLStartPageView alloc] initWithFrame:self.window.bounds];
        [startPageView show];
    }

这个时候就可以可以测试喽~

#### 四、压缩文件截图 ####

![A76F7747-90AB-44F6-BBCC-7B2315EC6291.png][]

界面性问题可以根据自己项目需求调整即可, 具体可参考代码, 项目能够直接运行!

#### 注：本文著作权归作者，由demo大师（[http://www.demodashi.com][http_www.demodashi.com]）宣传，拒绝转载，转载需要作者授权 ####

[http_www.demodashi.com_demo_10700.html]: http://www.demodashi.com/demo/10700.html
[_7.34.54.gif]: /images/20220531/9c8496c1d43e407caeaf828b006a5ed5.png
[A76F7747-90AB-44F6-BBCC-7B2315EC6291.png]: /images/20220531/55d1e6528fa34895933f7610664fe1dd.png
[http_www.demodashi.com]: http://www.demodashi.com/