问题1：
我在github上找到了代码，我设法将其导入到我的ARC项目中并设置了一个非ARC标志，一切正常。
我想做的就是将代码转换为ARC，因此处理起来会容易得多。
在尝试修复时，
C指针类型'CFStringRef'的强制转换.....需要桥接强制转换
之前：NSString *notifyname=(NSString *)name;
之后：NSString *notifyname=(NSString *)CFBridgingRelease(name);
-我摆脱了错误。
然后，
选择器'sharedMessageCenter'的未知类方法未知
选择器'incomingMessageWithId：'的类方法没有已知的类
选择器'messageType'的方法没有已知的选择器类方法
'canonicalFormat'
问题2：
另外，我无法使其在后台阻止所有电话。
应用启用后：我可以阻止所有电话并断开特定的电话号码，
当应用程序处于后台时：我无法阻止所有电话，只能阻止特定的电话号码。
附言-想编写“停止”功能有什么主意吗？
代码是：
CallHandler.h：
//
// CallHandler.h
// PhoneCallBlock
//
// Created by Hui Li on 12-5-11.
// Copyright (c) 2012年 hust. All rights reserved.
//
#import <Foundation/Foundation.h>
#define kCTIndicatorsSignalStrengthNotification @"kCTIndicatorsSignalStrengthNotification"
#define kCTRegistrationStatusChangedNotification @"kCTRegistrationStatusChangedNotification"
#define kCTRegistrationDataStatusChangedNotification @"kCTRegistrationDataStatusChangedNotification"
#define kCTRegistrationCellChangedNotification @"kCTRegistrationCellChangedNotification"
#define kCTIndicatorRadioTransmitNotification @"kCTIndicatorRadioTransmitNotification"
@interface CallHandler : NSObject
{
}
+ (void)start;
static void callback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo);
static void signalHandler(int sigraised);
@end
CallHandler.m：
//
// CallHandler.m
// PhoneCallBlock
//
// Created by Hui Li on 12-5-11.
// Copyright (c) 2012年 hust. All rights reserved.
//
#import "CallHandler.h"
@implementation CallHandler
extern NSString* const kCTSMSMessageReceivedNotification;
extern NSString* const kCTSMSMessageReplaceReceivedNotification;
extern NSString* const kCTSIMSupportSIMStatusNotInserted;
extern NSString* const kCTSIMSupportSIMStatusReady;
typedef struct __CTCall CTCall;
extern NSString *CTCallCopyAddress(void*, CTCall *);
extern void CTCallDisconnect(CTCall*);
void* CTSMSMessageSend(id server,id msg);
typedef struct __CTSMSMessage CTSMSMessage;
NSString *CTSMSMessageCopyAddress(void *, CTSMSMessage *);
NSString *CTSMSMessageCopyText(void *, CTSMSMessage *);
int CTSMSMessageGetRecordIdentifier(void * msg);
NSString * CTSIMSupportGetSIMStatus();
NSString * CTSIMSupportCopyMobileSubscriberIdentity();
id CTSMSMessageCreate(void* unknow/*always 0*/,NSString* number,NSString* text);
void * CTSMSMessageCreateReply(void* unknow/*always 0*/,void * forwardTo,NSString* text);
id CTTelephonyCenterGetDefault(void);
void CTTelephonyCenterAddObserver(id,id,CFNotificationCallback,NSString*,void*,int);
void CTTelephonyCenterRemoveObserver(id,id,NSString*,void*);
int CTSMSMessageGetUnreadCount(void);
#pragma mark - Call Block Methods
+ (void)start
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
// Initialize listener by adding CT Center observer implicit
id ct = CTTelephonyCenterGetDefault();
CTTelephonyCenterAddObserver( ct, NULL, callback,NULL,NULL,
CFNotificationSuspensionBehaviorHold);
// Handle Interrupts
sig_t oldHandler = signal(SIGINT, signalHandler);
if (oldHandler == SIG_ERR)
{
NSLog(@"Could not establish new signal handler");
exit(1);
}
// Run loop lets me catch notifications
NSLog(@"Starting run loop and watching for notification.\n");
CFRunLoopRun();
// Shouldn't ever get here. Bzzzt
NSLog(@"Unexpectedly back from CFRunLoopRun()!\n");
[pool release];
}
static void callback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
NSString *notifyname=(NSString *)name;
if ([notifyname isEqualToString:@"kCTCallStatusChangeNotification"])//电话
{
NSDictionary *info = (NSDictionary*)userInfo;
NSString *state=[info[@"kCTCallStatus"] stringValue];
if ([state isEqualToString:@"5"])//disconnect
NSLog(@"未接:%@",state);
}
else if ([notifyname isEqualToString:@"kCTCallIdentificationChangeNotification"])
{
NSDictionary *info = (NSDictionary *)userInfo;
CTCall *call = (CTCall *)info[@"kCTCall"];
NSString *caller = CTCallCopyAddress(NULL, call);
NSLog(@"电话号码:%@",caller);
if ([caller isEqualToString:@"1800123456"])
{
//disconnect this call
NSLog(@"挂雷冰");
CTCallDisconnect(call);
}
}
else if ([notifyname isEqualToString:@"kCTMessageReceivedNotification"])//收到短信
{
/*
kCTMessageIdKey = "-2147483636";
kCTMessageTypeKey = 1;
*/
NSDictionary *info = (NSDictionary *)userInfo;
CFNumberRef msgID = (CFNumberRef)info[@"kCTMessageIdKey"];
int result;
CFNumberGetValue((CFNumberRef)msgID, kCFNumberSInt32Type, &result);
Class CTMessageCenter = NSClassFromString(@"CTMessageCenter");
id mc = [CTMessageCenter sharedMessageCenter];
id incMsg = [mc incomingMessageWithId: result];
int msgType = (int)[incMsg messageType];
if (msgType == 1) //experimentally detected number
{
id phonenumber = [incMsg sender];
NSString *senderNumber = (NSString *)[phonenumber canonicalFormat];
id incMsgPart = [incMsg items][0];
NSData *smsData = [incMsgPart data];
NSString *smsText = [[NSString alloc] initWithData:smsData encoding:NSUTF8StringEncoding];
}
}
else if ([notifyname isEqualToString:@"kCTIndicatorsSignalStrengthNotification"])//信号
{
/*
kCTIndicatorsGradedSignalStrength = 2;
kCTIndicatorsRawSignalStrength = "-101";
kCTIndicatorsSignalStrength = 19;
*/
}
else if ([notifyname isEqualToString:@"kCTRegistrationStatusChangedNotification"])//网络注册状态
{
/*
kCTRegistrationInHomeCountry = 1;
kCTRegistrationStatus = kCTRegistrationStatusRegisteredHome;
*/
}
else if ([notifyname isEqualToString:@"kCTRegistrationDataStatusChangedNotification"])
{
/*
kCTRegistrationDataActive = 1;
kCTRegistrationDataAttached = 1;
kCTRegistrationDataConnectionServices = (
kCTDataConnectionServiceTypeInternet,
kCTDataConnectionServiceTypeWirelessModemTraffic,
kCTDataConnectionServiceTypeWirelessModemAuthentication
);
kCTRegistrationDataContextID = 0;
kCTRegistrationDataIndicator = kCTRegistrationDataIndicator3G;
kCTRegistrationDataStatus = kCTRegistrationDataStatusAttachedAndActive;
kCTRegistrationDataStatusInternationalRoaming = 1;
kCTRegistrationRadioAccessTechnology = kCTRegistrationRadioAccessTechnologyUTRAN;
*/
}
else if ([notifyname isEqualToString:@"kCTRegistrationCellChangedNotification"])
{
/*
kCTRegistrationGsmCellId = 93204174;
kCTRegistrationGsmLac = 55583;
kCTRegistrationInHomeCountry = 1;
kCTRegistrationRadioAccessTechnology = kCTRegistrationRadioAccessTechnologyUTRAN;
*/
}
else if ([notifyname isEqualToString:@"kCTIndicatorRadioTransmitNotification"])
{
/*
kCTRadioTransmitDCHStatus = 1;
*/
}
//NSLog(@"名字:%@-详细:%@",notifyname,userInfo);
}
static void signalHandler(int sigraised)
{
NSLog(@"\nInterrupted.\n");
exit(0);
}
@end
最佳答案
在LLVM网站上查看ARC documentation。您必须使用__bridge或其他关键字之一。
这是因为Core Foundation对象（CF * Refs）不受ARC控制，只有Obj-C对象受控制。因此，当您在它们之间进行转换时，必须告诉ARC对象的所有权，以便它可以正确清理它们。最简单的情况是__bridge强制转换，为此ARC不会做任何额外的工作（假定您自己处理对象的内存）。
关于ios - 尝试将非ARC'CallHandler'(调用阻止程序)转换为ARC时遇到问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/17986911/