NSMutableData initWithLength
- (id)initWithLength:(NSUInteger)length
Parameters
length
The number of bytes the object initially contains.
Return Value of [NSMutableData initWithLength]
An initialized NSMutableData object containing length zeroed bytes.
NSMutableData initWithLength example.
-(NSMutableData*) bar
{
return [[[NSMutableData alloc] initWithLength:100] autorelease];
}
{
return [[[NSMutableData alloc] initWithLength:100] autorelease];
}
Example of [NSMutableData initWithLength].
NSUInteger length = [[invocation methodSignature] methodReturnLength];
if(length!=0){
NSMutableData * dat = [[NSMutableData alloc] initWithLength:length];
void* returnBuffer = [dat mutableBytes];
[invocation getReturnValue:&returnBuffer];
void(^delayedFree)(void) = ^{ [dat release]; };
[[NSOperationQueue mainQueue] addOperationWithBlock:delayedFree];
return returnBuffer;
}
return nil;
if(length!=0){
NSMutableData * dat = [[NSMutableData alloc] initWithLength:length];
void* returnBuffer = [dat mutableBytes];
[invocation getReturnValue:&returnBuffer];
void(^delayedFree)(void) = ^{ [dat release]; };
[[NSOperationQueue mainQueue] addOperationWithBlock:delayedFree];
return returnBuffer;
}
return nil;
NSMutableData initWithLength example.
- (NSMutableData *)dataToBeLoaded;
{
if (!_dataToBeLoaded) {
_dataToBeLoaded = [[NSMutableData alloc] initWithLength:1000];
}
return _dataToBeLoaded;
}
{
if (!_dataToBeLoaded) {
_dataToBeLoaded = [[NSMutableData alloc] initWithLength:1000];
}
return _dataToBeLoaded;
}
