NSString

[ajitbiswal]

getBytes:maxLength:usedLength:encodingptions:ran ge:remainingRange:


what is the use of this method... can anyone explain..The description of parameters are....

Parameters
buffer
A buffer into which to store the bytes from the receiver. The returned bytes are not NULL-terminate

maxBufferCount
The maximum number of bytes to write to buffer.
usedBufferCount
The number of bytes used from buffer. Pass NULL if you do not need this value.
encoding
The encoding to use for the returned bytes.
options
A mask to specify options to use for converting the receiver’s contents to encoding (if conversion is
necessary).
range
The range of characters in the receiver to get.
leftover
The remaining range. Pass NULL If you do not need this value.
Return Value
YES if some characters were converted, otherwise NO.

[FlyingDiver]

Did you read the description in the class specification?

joe

[ajitbiswal]

Originally Posted by FlyingDiver

Did you read the description in the class specification?

joe

i am not getting you....sorry for this... please explain me...

[FlyingDiver]

I asked, did you read the documentation?

It's used to convert an NSString to an array of bytes.

joe

[ajitbiswal]

Originally Posted by FlyingDiver

I asked, did you read the documentation?

It's used to convert an NSString to an array of bytes.

joe

I understand this but the buffer(max,used) and receiver range concept confusing me..

[FlyingDiver]

Originally Posted by ajitbiswal

I understand this but the buffer(max,used) and receiver range concept confusing me..

Max is to tell the NSString object how long the array is that's available to hold the converted string. Used is for the NSString to tell you how much of the buffer it actually used. Range is so you can specify what part of the NSString you want converted to bytes.

You could have been a little more specific in your original question.

The docs actually do say all this.

joe

[ajitbiswal]

Originally Posted by FlyingDiver

Max is to tell the NSString object how long the array is that's available to hold the converted string. Used is for the NSString to tell you how much of the buffer it actually used. Range is so you can specify what part of the NSString you want converted to bytes.

You could have been a little more specific in your original question.

The docs actually do say all this.

joe

You have mention that in max part we have to give the max size of buffer and in range part the no of character to be converted.In used buffer part we have to give the buffer size to be used for the above characters but matter is that how can we know how much size it going occupy in buffer..

[FlyingDiver]

Originally Posted by ajitbiswal

You have mention that in max part we have to give the max size of buffer and in range part the no of character to be converted.In used buffer part we have to give the buffer size to be used for the above characters but matter is that how can we know how much size it going occupy in buffer..

No, read the API section again:

The number of bytes used from buffer. Pass NULL if you do not need this value.

The NSString sets that variable to the number of bytes actually used. You have to pass in a pointer to a variable there. If you don't care how many it actually used, then pass in NULL.

joe

[ajitbiswal]

Originally Posted by FlyingDiver

No, read the API section again:

The number of bytes used from buffer. Pass NULL if you do not need this value.

The NSString sets that variable to the number of bytes actually used. You have to pass in a pointer to a variable there. If you don't care how many it actually used, then pass in NULL.

joe

Please give me one example....

[ajitbiswal]

I am new to this language so it is very difficult for me to understand thats why i was asking for example... please give me example.... I have asked to complete all the functions in a specified time....thank u for making me understand the concept...