IOS Retain,nil,alloc,init

retain----retainCount -1;

nil----retainCount =0;

1 Retain,alloc,init

int main(int argc, char *argv[])

{

NSAutoreleasePool *pool=[[NSAutoreleasePool alloc] init];

SomeClass *object=[[SomeClass alloc] init];

NSLog(@"1,object retain count is :%d",[object retainCount]);

[object retain];

NSLog(@"2,object retain count is :%d",[object retainCount]);

object=nil;

//[object release];

NSLog(@"3,object retain count is :%d",[object retainCount]);

object=nil;

NSLog(@"4,object retain count is :%d",[object retainCount]);

[pool release];

return 0;

}

2 run result:


[b]2012-07-15 00:49:52.122 RetainCounts[1259:f803] 1,object retain count is :1

2012-07-15 00:49:52.124 RetainCounts[1259:f803] 2,object retain count is :2

2012-07-15 00:49:52.125 RetainCounts[1259:f803] 3,object retain count is :0

2012-07-15 00:49:52.125 RetainCounts[1259:f803] 4,object retain count is :0

[/b]

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