可变副本内存泄漏

Question

此行是否泄漏内存？请说明是或否。

Person.h
-------
NSMutableString *address;

Person.m
--------
@synthesize address;
-(id) init
{
    self = [super init];
    address = [[NSMutableString alloc] init];
    return self;
}
-(void) funcA()
{
    [address appendFormat:@"located|at|%@", @"Singapore"];
     address = [[address stringByReplacingOccurrencesOfString:@"|" withString:@" "] mutableCopy];
}
-(void) dealloc
{
    [address release];
    [super release]
}

=address是一个NSMutableString，也是一个属性。我只在解除锁定方法上发布它。

Answer 1

您在这里泄漏：

[address appendFormat:@"located|at|%@", @"Singapore"];
address = [[address stringByReplacingOccurrencesOfString:@"|" withString:@" "] mutableCopy];

您正在将地址替换为第二行中的新NSMutableString。

只需使用replaceOccurrencesOfString:withString:options:range:，就不必替换字符串。

[address appendFormat:@"located|at|%@", @"Singapore"];
[address replaceOccurrencesOfString:@"|" withString:@" " options:NSCaseInsensitiveSearch range:NSMakeRange(0, address.length -1)];