ios:升级到Xcode4.5.1的警告处理

Xcode升级到4.5后，出现了一堆的Warning.网上搜了一些办法，总结一下。

1:Jsonkit中的

Direct access to objective-c's isa is deprecated in favor of object_setClass() and object_getClass()

object->isa 替换为 object_getClass(object)
keyObject->isa 替换为 object_getClass(keyObject)
(id)keys[idx]->isa 替换为 object_getClass((id)keys[idx])

format specifies type 'unsigned long' but the argument has type 'nsuinteger' (aka 'unsigned int')
给变量增加(unsigned long)进行类型转换

2：md5加密（iOS SDK中自带了CommonCrypto）

Implicit declaration of function 'CC_MD5' is invalid in C99

 #define CC_MD5_DIGEST_LENGTH 16
 +(NSString *)MD5HashForString:(NSString *)input {
     const char *cStr = [input UTF8String];
     unsigned char result[CC_MD5_DIGEST_LENGTH];
     CC_MD5(cStr, strlen(cStr), result);
     return [NSString stringWithFormat: @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
             result[0], result[1], result[2], result[3],
             result[4], result[5], result[6], result[7],
             result[8], result[9], result[10], result[11],
             result[12], result[13], result[14], result[15]];
 }

引入函数定义的头文件

#import <CommonCrypto/CommonDigest.h>

3:ASIDataDecompressor中的警告

format specifies type  'short' but the  argument has type 'int'

在+ (NSError *)deflateErrorWithCode:(int)code 和 +(NSError *)inflateErrorWithCode:(int)code中

［NSString stringWithFormat:@"Compression of data failed with code %hi",code] 中

将code改为 (short)code,类型转换

4：Reachability中警告

Using 'stringWithString:' with a literal is redundant

 statusString = [NSString stringWithString: @"Not Reachable"]; 

 改为：statusString = @"Not Reachable";

5.format specifies type 'id' but the argument has type 'const char *'

NSCAssert(NO, @"Unhandled error encountered during SAX parse. msg is %@", msg);
改为：NSCAssert(NO, @"Unhandled error encountered during SAX parse. msg is %@", [NSString stringWithUTF8String:msg]);