iOS presentation graph drop-down refresh control

Uirefreshcontrol is using this control. This property is Refreshcontrol in Uitableviewcontroller.

The initialization of the table and the data settings are consistent with the general.

1: Initialize the Uirefreshcontrol control and bind the Pull event

// Add drop-down refresh control

*rc=[[ uirefreshcontrol ]  ];

    RC. Attributedtitle alloc  initwithstring : @ " dropdown refresh " ";

bind drop Event

[RC addTarget: self action:@selector(refreshtableview) forControlEvents:uicontroleventvaluechanged];

self. Refreshcontrol = RC;

2: Add a drop-down event function, request data in the drop-down event and modify the control state, bind the callback function

// pull-down action response function.

-(void) Refreshtableview

{

if(self. Refreshcontrol. Refreshing) {

        Self.Refreshcontrol.Attributedtitle= [[NsattributedstringAlloc]initwithstring:@"Loading in ... "];

// Add Simulation Data

nsdate *now = [[nsdate alloc] init];

          // adds a callback function that simulates the request. You need to close the load state after the request has ended.

[ self performselector:@selector(callbackmethod:) withobject: Now afterdelay:3];

}

}

3: Modify the control state in the callback function and update the data and table views.

-(void) Callbackmethod: (ID) obj

{

// End Load Status

[self. Refreshcontrol endrefreshing];

    Self.Refreshcontrol.Attributedtitle= [[NsattributedstringAlloc]initwithstring:@"Drop-down refresh"];

// add data, Refresh table

[Self. ListData addobject:(nsdate *) obj];

[self. TableView reloaddata];

}

This article is from the "zhuoking" blog, make sure to keep this source http://9951038.blog.51cto.com/9941038/1772577

iOS presentation graph drop-down refresh control