App subversion to float

Question

I am getting my app's version like this:

NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"]

And then trying to convert it to a float like this:

[version floatValue]

Now that all works great, but when I have a minor version like "1.1.1" everything behind the second decimal point is truncated.

What is the best way to keep everything behind the second decimal point?

How do you expect it to be converted? In real numbers, you only have one decimal point... — , Jan 28 '13 at 18:54
Probably better to map to an int -- "1.1.1" => 0x01010100 or some such. — Hot Licks, Jan 28 '13 at 19:08

score 2 · Accepted Answer · edited May 23 '17 at 11:56

2

To keep it in sync with how you started...

int major, minor, bug;
NSArray *versionItems = [version componentsSeparatedByString:@"."];
major = [[versionItems objectAtIndex:0] intValue]; 
minor = [[versionItems objectAtIndex:1] intValue];
bug = [[versionItems objectAtIndex:2] intValue];

But I'd recommend looking at this..

How do I determine the OS version at runtime in OS X or iOS (without using Gestalt)?

edited May 23 '17 at 11:56

Community

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answered Jan 28 '13 at 19:01

estobbart

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don't forget to cast those NSString's into NSNumbers or integers – Daniel Jan 28 '13 at 19:11

App subversion to float

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