iOS NSError
2020-06-08 本文已影响0人
gaookey
NSError *error = [[NSError alloc] initWithDomain:@"testDomain"
code:9998
userInfo:@{NSLocalizedDescriptionKey:@"错误描述",
NSLocalizedFailureReasonErrorKey:@"错误原因",
NSLocalizedRecoverySuggestionErrorKey:@"解决建议",
NSLocalizedRecoveryOptionsErrorKey:@[@"解决建议可选1",@"解决建议可选2"]}];
// Domain 错误域:产生错误的地方(系统提供了一些定义的域)
/*
FOUNDATION_EXPORT NSString *const NSCocoaErrorDomain;
FOUNDATION_EXPORT NSString *const NSPOSIXErrorDomain;
FOUNDATION_EXPORT NSString *const NSOSStatusErrorDomain;
FOUNDATION_EXPORT NSString *const NSMachErrorDomain;
*/
NSString *domain = error.domain;
// code:错误码
NSInteger code = error.code;
// userInfo:错误信息(系统提供了很多定义的key)
NSDictionary *userInfo = error.userInfo;
NSString *localizedDescription = userInfo[NSLocalizedDescriptionKey];
NSString *localizedFailureReason = userInfo[NSLocalizedFailureReasonErrorKey];
NSString *localizedRecoverySuggestion = userInfo[NSLocalizedRecoverySuggestionErrorKey];
NSArray *localizedRecoveryOptions = userInfo[NSLocalizedRecoveryOptionsErrorKey];