ios - Load certain information from array index obj c -

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i have array loads information plist so:

nsmutablearray *array = [[nsmutablearray alloc] initwithcontentsoffile:@"items.plist"];

here how plist looks like:

<array> <dict>     <key>string</key>     <string>str</string>     <key>id</key>     <string>0</string> </dict> <dict>     <key>string</key>     <string>str2</string>     <key>id</key>     <string>1</string> </dict> <dict>     <key>string</key>     <string>str3</string>     <key>id</key>     <string>2</string> </dict> <dict>     <key>string</key>     <string>str4</string>     <key>id</key>     <string>35</string>     <key>data</key>     <string>5</string> </dict> </array>

i have created for-loop creates uibutton every string there in plist, how check in loop if index contain 'data' key? check if index has data can set image button.

something should work:

nsmutablearray *array = [[nsmutablearray alloc] initwithcontentsoffile:@"items.plist"]; (nsdictionary * dict in array) {     uibutton * newbtn = [uibutton buttonwithtype:uibuttontypesystem];     [newbtn settitle:dict[@"id"] forstate:uicontrolstatenormal];      // -- update comment -- //     // see if data exists     if (dict[@"data"]) {         // if data's value image ...         [newbtn setimage:dict[@"data"] forstate:uicontrolstatenormal];          // in question values @"data" integers, make sure don't try add image.      }      // other stuff button ...  }

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