如果这样写:
- #include "say.h"
- #include <Foundation/Foundation.h>
- int main(void)
- {
- id speaker;
- NSString *name = @"GNUstep !";
- NSAutoreleasePool *pool;
- NSArray *outArray;
- NSArray *array2;
- array2 = [NSMutableArray arrayWithCapacity:20];
- pool = [NSAutoreleasePool new];
- speaker = [[Say alloc] init];
- outArray = [NSArray arrayWithObjects: @"Msg1", @"Msg2", @"Msg3", @"Msg4", nil];
- //printf("%@\n", [outArray objectAtIndex: 0]); //GNUstep下只输出了@
- //GSPrintf(stdout, "%@", [outArray objectAtIndex: 1]); // GNUstep下崩溃
- NSLog(@"%@\n", [outArray objectAtIndex: 2]); // GNUStep下ok
- [speaker sayHello];
- [speaker sayHelloTo: name];
- RELEASE(speaker);
- RELEASE(pool);
- #ifdef DEBUG
- NSLog(@"%@\n", @"Debug Now");
- #endif
- return 0;
- }
array2 就不受内存池管控,执行时会报错:
$ ./obj/HelloWorld.exe
2013-03-15 15:20:57.015 HelloWorld[5372] autorelease called without pool for ob
ect (0x3eb2f8) of class GSMutableArray in thread <NSThread: 0x520878>
把 array2 = [NSMutableArray arrayWithCapacity:20]; 放置到 pool = [NSAutoreleasePool new]; 之后,就没有问题了。
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