创家一个继承于ViewController的 我在这里命名为“启动View”

在appledeledate.m里面设置  启动View   为主界面
self.window.rootViewController =[QidongViewController new];

在   启动View.m
#import "QidongViewController.h"
#import "ViewController.h"
@interface QidongViewController ()
{
    NSTimer *timer;
}
@end

@implementation QidongViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIImageView *somImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    somImage.image = [UIImage imageNamed:@"5"];
    [self.view addSubview:somImage];
    
    UIButton *tiaoguoBtn = [[UIButton alloc] initWithFrame:CGRectMake(100, 20, 80, 80)];
    [tiaoguoBtn setBackgroundColor: [UIColor blackColor]];
        [tiaoguoBtn setTitle:@"跳过" forState:UIControlStateNormal];
    [tiaoguoBtn addTarget:self action:@selector(timeNoHave) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:tiaoguoBtn];
    timer = [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(timeNoHave) userInfo:nil repeats:YES];
    
}
- (void)timeNoHave{
    [timer invalidate];
    [self presentViewController:[ViewController new] animated:NO completion:nil];
}

package com.tainyunjuhe.news.activity;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import com.tainyunjuhe.news.R;
import com.tainyunjuhe.news.entity.GlideImageLoader;
import com.youth.banner.Banner;
import com.youth.banner.BannerConfig;
import java.util.ArrayList;
import java.util.List;

public class QiDong extends AppCompatActivity {
    private boolean stopThread=false;//是否开启线程
    private boolean ok=true;//是否跳转
    private Banner banner;
    private List<Integer> images;
    private Button bt_click;
    private Intent mIntent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //隐藏标题栏以及状态栏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        /**标题是属于View的，所以窗口所有的修饰部分被隐藏后标题依然有效,需要去掉标题**/
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_qi_dong);
        banner= (Banner) findViewById(R.id.banner);
        bt_click= (Button) findViewById(R.id.bt_click);
        bt_click.getBackground().setAlpha(50);设置透明度（0-200多）
	mIntent=new Intent(QiDong.this,MainActivity.class);
	bt_click.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                ok=false;                startActivity(mIntent);                finish();            }        });    private void firstShow(){        images=new ArrayList<>();        images.add(R.drawable.ic_launcher);        images.add(R.drawable.ic_launcher5);        images.add(R.drawable.ic_launcher2);        images.add(R.drawable.ic_launcher3);        images.add(R.drawable.ic_launcher4);        /*//设置banner样式        banner.setBannerStyle(BannerConfig.CIRCLE_INDICATOR_TITLE);*/        //设置图片加载器        banner.setImageLoader(new GlideImageLoader());        //设置图片集合        banner.setImages(images);        //设置自动轮播，默认为true        banner.isAutoPlay(false);        //设置轮播时间        banner.setDelayTime(1500);        //设置指示器位置（当banner模式中有指示器时）        banner.setIndicatorGravity(BannerConfig.RIGHT);        //banner设置方法全部调用完毕时最后调用        banner.start();        new Thread(){            @Override            public void run() {                super.run();                if (!stopThread){                    try {                        sleep(3000);                        if (ok){//设置点击按钮后不再从线程跳转，否则会从线程再跳转一次                            startActivity(mIntent);                            finish();                        }                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }            }        }.start();    }    @Override    protected void onPause() {        stopThread=true;//关闭线程        super.onPause();    }}

看到过有个项目中，启动页面一张图片,右上角是一个圆形跳过,并且有一个逐渐缩小的圆弧

首先，先画一个实心灰色圆，在中间画一个跳转字，在外边画一个圆弧  启动动画就设置圆弧的开始角度和结束角度
public class JumpOverView extends View {
    private Context context;
    //写字画笔
    private Paint paintText;
    //灰色背景画笔
    private Paint paintBg;
    //幅度画笔
    private Paint paintArc;
    //计时器
    Timer timer;
    private int jindu = 0;

    public JumpOverView(Context context) {
        super(context);
        this.context = context;
        init();
    }

    public JumpOverView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        this.context = context;
        init();
    }

    public JumpOverView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.context = context;
        init();
    }

    private void init() {
        paintText = new Paint();
        paintText.setTextSize(35);
        paintText.setTextAlign(Paint.Align.CENTER);
        paintText.setColor(context.getResources().getColor(R.color.white));
        paintText.setAntiAlias(true);
        paintBg = new Paint();
        paintBg.setStyle(Paint.Style.FILL);
        paintBg.setColor(context.getResources().getColor(R.color.textColor99));
        paintBg.setAntiAlias(true);
        paintArc = new Paint();
        paintArc.setColor(context.getResources().getColor(R.color.colorPrimary));
        paintArc.setStyle(Paint.Style.STROKE);
        paintArc.setStrokeWidth(10);
        paintArc.setAntiAlias(true);
        //触发动画
        this.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                timer = new Timer();
                timer.scheduleAtFixedRate(new TimerTask() {
                    public void run() {
                        if (jindu < 360) {
                            jindu = jindu + 10;
                        } else {
                            jindu = 360;
                            timer.cancel();
                        }
                        postInvalidate();
                    }
                }, 0, 100); //等待3秒开始  一秒一次
            }
        });
    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, 100, paintBg);
        Paint.FontMetrics fontMetrics = paintText.getFontMetrics();
        float top1 = fontMetrics.top;//为基线到字体上边框的距离,即上图中的top
        float bottom = fontMetrics.bottom;//为基线到字体下边框的距离,即上图中的bottom
        int baseLineY = (int) (getHeight() / 2 - top1 / 2 - bottom / 2);//基线中间点的y轴计算公式
        canvas.drawText("跳过", getWidth() / 2, baseLineY, paintText);
        RectF oval = new RectF(getWidth() / 2 - 100, getHeight() / 2 - 100, getWidth() / 2 + 100, getHeight() / 2 + 100);
        canvas.drawArc(oval, -90 + jindu, 360 - jindu, false, paintArc);
    }
}

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

 intent.addCategory(Intent.CATEGORY_OPENABLE);

 intent.setType("image/*");

 startActivityForResult(Intent.createChooser(intent, "选择图片"), 0);