Objective-C error message while creating NSRange

Question

I try to create an NSRange object in Objective-C on my Mac. Unfortunately it gives me an error message which I cannot solve or debug.

NSRange newRange = [data rangeOfData:dataToFind
                                      options:kNilOptions
                                        range:NSMakeRange(0u, [newData length])];

The error message I get is:

*** -[NSConcreteData rangeOfData:options:range:]: range {0, 81701012} exceeds data length 347124

The size of dataToFind is : 57854 The size of newData is : 81701012

The max. size of the NSRange length is by default an NSUInteger : 18446744073709551615

so what is the error message about? Where do the 347124 come from?

score 2 · Accepted Answer · answered Aug 28 '14 at 12:51

2

You are searching in data yet you provide the range to search starting from zero of the length newData.length. Apparently newData is longer than data. Change to NSMakeRange(0u, [data length]).

answered Aug 28 '14 at 12:51

Wojtek Surowka

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score 2 · Answer 2 · answered Aug 28 '14 at 12:51

You are referencing data but using the length of newData:

NSRange newRange = [data rangeOfData:dataToFind
                                      options:kNilOptions
                                        range:NSMakeRange(0u, [newData length])];

That doesn't look right.

Objective-C error message while creating NSRange

2 Answers2