-(void)testPrintf:(NSString **)testString
{
*testString=[*testString stringByAppendingFormat:@"%d",12];
}
NSString *test=@"test";
[selftestPrintf:&test];
NSlog(@"%@",test);
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-(void)testPrintf:(NSString **)testString
{
*testString=[*testString stringByAppendingFormat:@"%d",12];
}
NSString *test=@"test";
[selftestPrintf:&test];
NSlog(@"%@",test);
转载于:https://www.cnblogs.com/wolfsky6/archive/2012/11/19/2777773.html