nsstring - iPhone SDK: Errors when replacing string occurrences -

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i trying replace occurances of string in few different steps, using:

nsstring *doc = [[nsstring alloc] initwithdata:htmldata encoding:nsasciistringencoding]; doc = [doc stringbyreplacingoccurrencesofstring:@"###data###" withstring:cord]; doc = [doc stringbyreplacingoccurrencesofstring:@"###name###" withstring:ride.title]; doc = [doc stringbyreplacingoccurrencesofstring:@"###desc###" withstring:ride.description];  [doc release];

i first getting text file , wanting replace few string me own. but, getting following error when running this:

program received signal:  “exc_bad_access”. [switching thread 13059] data formatters temporarily unavailable, re-try after 'continue'. (not safe call dlopen @ time.)

i not understanding why getting exc_bad_access error. trying release has been released?!

nsstring *doc = [[nsstring alloc] initwithdata:htmldata encoding:nsasciistringencoding]; doc = [doc stringbyreplacingoccurrencesofstring:@"###data###" withstring:cord];

when assign doc in second line, lose reference string created.

[doc release];

in last line, when release string, you're not releasing original. you're releasing whatever now, result of line before that. original string leaks, overrelease replacement, , overrelease causes crash. either autorelease original string when create (and drop final release call) or use different temporary modified strings make in middle.

for example, change code to:

nsstring *doc = [[[nsstring alloc] initwithdata:htmldata encoding:nsasciistringencoding] autorelease]; doc = [doc stringbyreplacingoccurrencesofstring:@"###data###" withstring:cord]; doc = [doc stringbyreplacingoccurrencesofstring:@"###name###" withstring:ride.title]; doc = [doc stringbyreplacingoccurrencesofstring:@"###desc###" withstring:ride.description];

and won't leak. if still crashes after that, crash different cause (such using string later on without having held onto somewhere.) gdb friend--check says in backtrace.


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