Xcode 编译链接问题汇总(持续更新中....)

编写程序时,经常会用到别人已经写好的模块(模块的形式不同:有些是以静态库方式提供,有些提供C语言的接口,有些提供C++的接口).所以在链接的时候经常遇到一些问题,特记录
首先要明白一个道理:
.m文件只能识别OC,C语言; 即模块是OC或C语言编写的,就一般使用.m文件就可以了.
.mm文件是针对OC,C和C++三语音的; 注意模块是C++实现的,就不能在使用.m文件,要使用.mm文件(cpp文件没用过,不知情况了)
以下是一些具体编译错误汇总:
问题1.



或者



解决方法:把.m文件修改成.mm文件
问题2
"_compress", referenced from:
“_uncompress", referenced from:
"_compress2", referenced from:
"_inflateReset", referenced from:
"_inflateInit_", referenced from:
"_inflateEnd", referenced from:
"_inflateInit2_", referenced from:
与压缩,解压缩有关的链接问题,都可以通过 -lz解决.



问题3
在音频编解码的时候,在使用G711a格式的时候,原始文件是G711.c.这个在Xcode的默认编译器中是有错误的,
解决方式:需要修改成G711.cc
问题4



解决方式:添加一个libstdc++.dylib
问题5



解决方式:



问题5:
#ifdef ShowLog

#define DLog(...) NSLog(__VA_ARGS__)

#else

#define DLog(...)

#endif
///
+ (void)modifyPassword:(NSString *)password

oldPassword:(NSString *)oldPassword

success:(void (^)(NSDictionary *data))success

failure:(void (^)(NSDictionary *data))failure

{

password = [password stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

[[WebManager sharedInstance] Request:[NSString stringWithFormat:@"id=%@&password=%@&oldpassword=%@",

@"11",

@"11",

@"111"]

success:success

failure:failure];

}

AFJSONRequestOperation *operation =

[AFJSONRequestOperation

JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;

NSDictionary *data = (NSDictionary *)JSON;

NSString *result = [data objectForKey:@"result"];

if ([result isEqualToString:@"ok"]) {

if (success) {

success(data);

}

}

}

failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {

[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;

NSDictionary *data = [[NSDictionary alloc]

initWithObjects:[NSArray arrayWithObject:@"001"]

forKeys:[NSArray arrayWithObject:@"result"]];

if (failure) {

failure(data);

}

}];

/////

dispatch_group_t _group;

dispatch_queue_t _eventQueue;
@property (strong, nonatomic) NSMutableArray *eventObersvers;
_group = dispatch_group_create();

_eventQueue = dispatch_queue_create("com.111.eventQueue", NULL);
_eventObersvers = [[NSMutableArray alloc] init];
- (void)registerEventObserver:(id)observer {

dispatch_group_async(_group, _eventQueue, ^{

[self.eventObersvers addObject:observer];

});

}

- (void)unRegisterAllEventObserver {

dispatch_group_async(_group, _eventQueue, ^{

[self.eventObersvers removeAllObjects];

});

}