ios - Write to plist file (In Particular row/Item) -


i have .plist file have structure,

enter image description here

i want add or replace item 5. using code

nserror *error ; nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes); nsstring *documentsdirectory = [paths objectatindex:0]; nsstring *path = [documentsdirectory stringbyappendingpathcomponent:@"introduction.plist"];  nsmutablearray *data = [[nsmutablearray alloc] initwithcontentsoffile:path]; nsstring *comment = str; [data replaceobjectatindex:1 withobject:comment]; [data writetofile:path atomically:yes];  nsfilemanager *filemanager = [nsfilemanager defaultmanager]; if (![filemanager fileexistsatpath:path]) {     nsstring *bundle = [[nsbundle mainbundle] pathforresource:@"introduction" oftype:@"plist"];     [filemanager copyitematpath:bundle topath:path error:&error]; }

if change replaceobjectatindex: 5 changes plist structure, , don't want that.

how can insert/replace text @ row 5 (item 5) of particular index?

you structure has array of arrays.

[data replaceobjectatindex:1 withobject:comment];

by code replacing array @ index 1 string. need insert 5th index or need add existing sub array? 

 nsmutablearray *subarray = [data[sectionindex] mutablecopy]; if (!subarray) {     subarray = [nsmutablearray array]; }  if (rowindex<[subarray count]) {     [subarray replaceobjectatindex:rowindex withobject:comment]; }else{     [subarray addobject:comment]; }  [data replaceobjectatindex:sectionindex withobject:subarray]; [data writetofile:path atomically:no];

access subarray, make mutable , add or insert @ specific index. if trying insert don't forget include check if index not greater count of array.


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