iphone开发在应用中监听(判断)来电状态-接听-拒接

phone开发在应用中监听(判断)来电状态-接听-拒接-CoreTelephony  
zxwo0o IOS,iphone,互联网络 CoreTelephony, CTCallCenter  
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当我们应用在使用中时如果突然来电话了，应用就被暂时推到后台去，有时我们需要些针对来点的处理。  
可以使用如下方法来判断：使用CoreTelephony框架  
#import  
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#import  
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CTCallCenter *callCenter = [[CTCallCenter alloc] init];  
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    callCenter.callEventHandler=^(CTCall* call){  
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        if (call.callState == CTCallStateDialing){  
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            NSLog(@"Call Dialing");  
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        }  
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        if (call.callState == CTCallStateConnected){  
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            NSLog(@"Call Connected");  
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            [self performSelectorOnMainThread:@selector(closeTalk) withObject:nil waitUntilDone:YES];  
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        }  
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        if (call.callState == CTCallStateDisconnected){  
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            [self performSelectorOnMainThread:@selector(closeTalk) withObject:nil waitUntilDone:YES];  
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            NSLog(@"Call Disconnected");  
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        }  
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    };  
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将如上代码添加到  
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
中即可，有通话事件就会跑进那个block里面执行。