ios开发 怎么设置scrollview的分页

代码很简单，但是很实用，适合在一个Activity中要刷新局部的UI,比如在扫描一维码的时候，要把每次扫描的结果都显示在界面上 创建一个包含ScrollView的布局文件: 2.实现ScrollView的刷新 代码如下:package com.example.uirefresh; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ScrollView; import android.widget.TextView; public class MainActivity extends Activity implements android.view.View.OnClickListener{ private Button btnExit; private TextView text; private ScrollView scroll; private boolean bool = true; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnExit = (Button) findViewById(R.id.exit); text = (TextView) findViewById(R.id.text); scroll = (ScrollView) findViewById(R.id.scroll); btnExit.setOnClickListener(this); //在主线程main中开一子线程来刷新局部的ScrollView new Thread(new RefreshThread()).start(); } @Override public void onClick(View v) { switch(v.getId()) { case R.id.exit : finish(); break; } } public class RefreshThread implements Runnable{ @Override public void run() { while(bool) { try { Thread.sleep(5000);//每五秒刷新一次 } catch (InterruptedException e) { e.printStackTrace(); } synchronized (this) { //用post方法刷新 text.post(new Runnable() { @Override public void run() { text.append("Hello World...n"); } }); } } } } @Override protected void onDestroy(){ super.onDestroy(); bool = false; } }