小编cas*_*las的帖子

我创建了一个列表视图demo.list已成功创建,图像也正确添加到右侧.现在我想要当我点击列表视图中行右侧的交叉图像时,该行将被删除.如何执行此操作.

 public class MainActivity extends Activity {

            EditText editText;
            Button Button,Button1;
            ListView listView;
            ArrayList<String> listItems;
            BaseAdapter adapter;

            @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);


                editText = (EditText) findViewById(R.id.editText);
              //  int pos = editText.getText().length();
                //editText.setSelection(pos);
                Button = (Button) findViewById(R.id.Button);
                listView = (ListView) findViewById(R.id.listview);
                //listView.setSelection(listView.getAdapter().getCount()-1);


                listItems = new ArrayList<String>();
                //listItems.add("First item");

                //code to only set the simple text in the listview
                //adapter = new ArrayAdapter<String>(this, R.layout., listItems);


                //Here is the creation of new anonymous class,because we can not create subclass inside …

我试图调用URL并返回到json对象.但是,我无法找到将基本身份验证放在AFNetworking操作中的位置.我可以使用POSTMAN获取我的JSON对象,如下所示.

AFNetworking操作的代码片段:

    NSString *string = @"MYURL";
    NSURL *url = [NSURL URLWithString:string];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    operation.responseSerializer = [AFJSONResponseSerializer serializer];
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    int total_count = (int)[[responseObject valueForKey:@"total_count"] integerValue];
        if (total_count > 0) {
            NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:total_count];
            for (int i = 1; i <= total_count; i++) {
                NSString *key = [NSString stringWithFormat:@"%i", i];
                id object = [responseObject objectForKey:key];
                [array addObject:object];
            }
            menuArray=array;
            tableData = [NSArray arrayWithArray:array];
            [categoryTableView reloadData]; …

我有以下实现,我使用colorField分配颜色.但是,即使我正确地为条形图堆栈对象着色,但此颜色与图例颜色不匹配.我认为它应该以某种方式绑定,我该如何解决？

我用过colorField,因为我想为bar stack列中的配对对象分配相同的颜色.

dataSample:

data[0] = {
    "value": 29,
    "series": 1,
    "category": "Men",
    "fname": "NY",
    "valueColor": "black"
}, 

http://jsfiddle.net/fm79hsms/13/

我有一个工作代码，可以将图像复制到 UIPasteboard，但找不到以编程方式实现 PASTE 功能的方法。任何想法或提示？

我试图将所选项目从列表传递到详细信息视图,但即使它不在,也myitem为空.DetailViewmodelMyViewModel

MyViewModel.cs

    public virtual ICommand ItemSelected
    {
        get
        {
            return new MvxCommand<MyViewModel>(item =>{SelectedItem = item;});
        }
     }

    public MyViewModel SelectedItem
    {
        get { return _selectedItem; }
        set
        {
            _selectedItem = value;
            // myItem is NOT null here!!!
            ShowViewModel<MyDetailViewModel>(new { date = Date, myItem = _selectedItem });
            RaisePropertyChanged(() => SelectedItem);
        }
    }

MyDetailViewModel.cs

public class  MyDetailViewModel: MvxViewModel
{
    private MyViewModel _myItem;

    public void Init(DateTime date, MyViewModel myItem = null)
    {
        // myItem is NULL here!!!
        _myItem = …

我添加了SVProgressHUD通过pod并添加了以下代码.一切正常,但alertview停留时间(估计大约4-5秒)比我想要的(1秒).我想知道有没有办法定制这个持续时间.

[SVProgressHUD setDefaultMaskType:SVProgressHUDMaskTypeNone];

[SVProgressHUD showSuccessWithStatus:@"Added to your cart."];

我有以下故事板.有一个OrderViewController,当我第一次打开应用程序时,它调用-(void) viewWillAppear: (BOOL) animated方法,但是当我打开另一个应用程序(将此应用程序放在后台),然后再次回到此应用程序时,viewWillAppear方法不再被调用？

当我运行以下代码时,它会打印出来.但是,我预计只有一个而不是两个.

for i in (1,1):
    print(i)

产量

1    
1

我想知道给定集合中有多少常见字符.

Input: J = "aA", S = "aAAbbbb"
Output: 3

在python解决方案中,如下所示:

lookup = set(J)
return sum(s in lookup for s in S)

我在Swift中有以下解决方案,但它看起来太罗嗦了.我想学习它的简短方法.

class Solution {
    func checkInItems(_ J: String, _ S: String) -> Int {
        let lookup = Set(J) ;
        var sy = 0;
        for c in S
        {
            if lookup.contains(c)
            {
               sy += 1;                
            }
        }        
        return sy;
    }
}

我想知道为什么Swift使用Element而不是Generic <T>下面的示例。

Elementvs和有什么区别T