为什么 NSLog 不输出 aString 参数？

Question

我在Tweak.xm中有以下代码：

%hook NSString
- (BOOL)isEqualToString:(NSString *) aString {
    NSLog(@"%@", [NSString stringWithFormat:@"isEqualToString for : %@ with: %@", aString, self]);

    return %orig;
}
%end

但是 syslog 输出显示 self 而不是 aString（应该在 for : 之后），示例：

Apr 9 20:46:32 remini CitrixReceiver-iPad[7972] <Warning>: isEqualToString for : with: /var/mobile/Containers/Data/Application/42123BED-A507-4CE0-97B0-20DFFD9BB78C Apr 9 20:46:32 remini CitrixReceiver-iPad[7972] <Warning>: isEqualToString for : with: /Applications/Cydia.app Apr 9 20:46:32 remini CitrixReceiver-iPad[7972] <Warning>: isEqualToString for : with: /private/var/lib/apt/ Apr 9 20:46:32 remini CitrixReceiver-iPad[7972] <Warning>: isEqualToString for : with: /var/mobile/Containers/Data/Application/42123BED-A507-4CE0-97B0-20DFFD9BB78C

为什么没有输出aString？

Answer 1

我会冒险猜测该字符串是 nil 或空的。在方法的开头检查它。即

if (aString == nil || [aString length] == 0) 
{
    ...
}

为什么 NSLog 不输出 aString 参数？

Why does NSLog not output aString parameter?

ios

objective-c

jailbreak

theos