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▪怎么解决UIScrollView中添加UITapGestureRecognizer跟UIButton点击事件冲突 如何解决UIScrollView中添加UITapGestureRecognizer跟UIButton点击事件冲突1.添加单击事件
UITapGestureRecognizer *gensture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrollViewTapAction)];
gensture.delegate .........
▪ ViewPager的使用方法跟实现过程 ViewPager的使用方法和实现过程看图先:
页面中填充内容是随机关键词飞入和飞出动画效果,随后会更新,现在请先无视吧
首先是 导入jar包 下载地址: android-support-v4.jar
布.........
▪ Core Data浅谈系列之4 : 数据模型的版本变迁 Core Data浅谈系列之四 : 数据模型的版本变迁继上一篇文章末尾提到的,一支队伍可以添加多名球员,不过一名球员只能属于一支队伍中,这分别对应着Core Data中一对多和一对一的属性关系:.........
[1]怎么解决UIScrollView中添加UITapGestureRecognizer跟UIButton点击事件冲突
来源: 互联网 发布时间: 2014-02-18
如何解决UIScrollView中添加UITapGestureRecognizer跟UIButton点击事件冲突
1.添加单击事件
UITapGestureRecognizer *gensture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrollViewTapAction)]; gensture.delegate = self; [scrollView addGestureRecognizer:gensture]; [gensture release];
2.实现UIGestureRecognizerDelegate中的
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
UIView *view = [touch view];
if ([view isKindOfClass:[UIButton class]]) {
return NO;
}
return YES;
}
[2] ViewPager的使用方法跟实现过程
来源: 互联网 发布时间: 2014-02-18
ViewPager的使用方法和实现过程
看图先:
页面中填充内容是随机关键词飞入和飞出动画效果,随后会更新,现在请先无视吧
首先是 导入jar包 下载地址: android-support-v4.jar
布局文件里添加viewPager布局
<android.support.v4.view.ViewPager
android:id="@+id/search_viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" >
</android.support.v4.view.ViewPager>
然后就是Activity了,主要写了左右滑动切换页面,还有一个小图片随页面切换 位移的动画效果
public class SearchAllcityActivity extends Activity {
private KeywordsFlow keywordsFlow;
private ViewPager viewPager;
private ImageView imageView;
private List<View> lists = new ArrayList<View>();
private ViewPagerAdapter adapter;
private Bitmap cursor;
private int offSet;
private int currentItem;
private Matrix matrix = new Matrix();
private int bmWidth;
private Animation animation;
private Button shuaxin_sq, shuaxin_fl;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_allcity);
// 随页面滑动图片
imageView = (ImageView) findViewById(R.id.viewpaget_img);
// 热门商圈和热门分类 页面添加到viewPager集合
lists.add(getLayoutInflater().inflate(R.layout.search_hot_shangqu, null));
lists.add(getLayoutInflater().inflate(R.layout.search_hot_fenlei, null));
// 初始化滑动图片位置
initeCursor();
adapter = new ViewPagerAdapter(lists);
viewPager = (ViewPager) findViewById(R.id.search_viewpager);
viewPager.setAdapter(adapter);
// ViewPager滑动监听器
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
// 当滑动时,顶部的imageView是通过animation缓慢的滑动
switch (arg0) {
case 0:
if (currentItem == 1) {
animation = new TranslateAnimation(offSet * 2 + bmWidth, 0, 0,0);
} else if (currentItem == 2) {
animation = new TranslateAnimation(offSet * 4 + 2 * bmWidth, 0,0, 0);
}
break;
case 1:
if (currentItem == 0) {
animation = new TranslateAnimation(0, offSet * 2 + bmWidth, 0,0);
} else if (currentItem == 2) {
animation = new TranslateAnimation(4 * offSet + 2 * bmWidth,offSet * 2 + bmWidth, 0, 0);
}
break;
}
currentItem = arg0;
animation.setDuration(500);
animation.setFillAfter(true);
imageView.startAnimation(animation);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
/**
* 计算滑动的图片的位置
*/
private void initeCursor() {
cursor = BitmapFactory.decodeResource(getResources(),R.drawable.viewpager_img);
bmWidth = cursor.getWidth();
DisplayMetrics dm;
dm = getResources().getDisplayMetrics();
offSet = (dm.widthPixels - 2 * bmWidth) / 4;
matrix.setTranslate(offSet, 0);
imageView.setImageMatrix(matrix); // 需要iamgeView的scaleType为matrix
currentItem = 0;
}
}
最后,不能忘了ViewPager的Adapter
public class ViewPagerAdapter extends PagerAdapter{
List<View> viewLists;
public ViewPagerAdapter(List<View> lists)
{
viewLists = lists;
}
@Override
public int getCount() { //获得size
// TODO Auto-generated method stub
return viewLists.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public void destroyItem(View view, int position, Object object) //销毁Item
{
((ViewPager) view).removeView(viewLists.get(position));
}
@Override
public Object instantiateItem(View view, int position) //实例化Item
{
((ViewPager) view).addView(viewLists.get(position), 0);
return viewLists.get(position);
}
}
[3] Core Data浅谈系列之4 : 数据模型的版本变迁
来源: 互联网 发布时间: 2014-02-18
Core Data浅谈系列之四 : 数据模型的版本变迁
继上一篇文章末尾提到的,一支队伍可以添加多名球员,不过一名球员只能属于一支队伍中,这分别对应着Core Data中一对多和一对一的属性关系:
如上两图,是在Team实体里面添加了一个players关系,指向Player实体,可以一支球队关联多名球员,并且最多只允许关联15名球员。
同样地,也为Player实体添加team关系,指向Team实体:
一名球员只能关联一支球队,并且让这个关系成双向的,即一个Player对象属于某支球队时,该球队的players属性就自动关联该Player对象。
做完以上对表关系的修改,再次运行程序。
Oops,运行不起来——
2013-01-16 16:56:18.667 cdNBA[18591:c07] Error : The operation couldn’t be completed. (Cocoa error 134100.) 2013-01-16 16:56:18.670 cdNBA[18591:c07] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This NSPersistentStoreCoordinator has no persistent stores. It cannot perform a save operation.'
这是由于我们刚才做了一番修改,persistentStoreCoordinator无法适应新的数据模型。
当开启一个新版本时,如果数据模型发生变动,我们需要创建一个新版本使用的数据模型:
并将其设置为当前版本使用的数据模型:
So,我们刚才发生的变动都应该应用在cdNBA 2.xcdatamodel上。
除此之外,还需要在persistentStoreCoordinator添加存储文件时设置一个选项:
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (nil != _persistentStoreCoordinator) {
return_persistentStoreCoordinator;
}
NSString *storeType = NSSQLiteStoreType;
NSString *storeName = @"cdNBA.sqlite";
NSError *error = NULL;
NSURL *storeURL = [NSURLfileURLWithPath:[[selfapplicationDocumentsDirectory] stringByAppendingPathComponent:storeName]];
NSDictionary *options = [NSDictionarydictionaryWithObjectsAndKeys:
[NSNumbernumberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumbernumberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];
_persistentStoreCoordinator = [[NSPersistentStoreCoordinatoralloc] initWithManagedObjectModel:self.managedObjectModel];
if (![_persistentStoreCoordinator addPersistentStoreWithType:storeType configuration:nilURL:storeURL options:options error:&error]) {
NSLog(@"Error : %@\n", [error localizedDescription]);
NSAssert1(YES, @"Failed to create store %@ with NSSQLiteStoreType", [storeURL path]);
}
return _persistentStoreCoordinator;
}
做完上面的工作,再跑一遍Demo。
Brief Talk About Core Data Series, Part 4 : Versioning of The Data Model
Jason Lee @ Hangzhou
Blog : http://blog.csdn.net/jasonblog
Weibo : http://weibo.com/jasonmblog
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