从Unix时间戳创建NSDate [英] Create NSDate from Unix timestamp

问题描述

如何从Unix时间戳创建NSDate?

How do I create an NSDate from a Unix timestamp?

channel.startDate = [NSDate dateWithTimeIntervalSince1970:
(NSTimeInterval)[channelJson objectForKey:@"broadcastStartedTime"]];

我收到此错误:

104:错误:在以下位置使用了指针值 浮点值是预期的

104: error: pointer value used where a floating point value was expected

channels.startDate是NSDate*.关键字"broadcastStartedTime"的值是由 SBJson转换为NSNumber或NSDecimalNumber的Javascript Number 解析器库.

channels.startDate is an NSDate*. The value for the key "broadcastStartedTime" is a Javascript Number converted into an NSNumber or NSDecimalNumber by the SBJson parser library.

推荐答案

尝试以下方法:

NSNumber *startTime = channelJson[@"broadcastStartedTime"];
channel.startDate = [NSDate dateWithTimeIntervalSince1970:[startTime doubleValue]];

您的值被困在NSNumber指针类型中. dateWithTimeIntervalSince1970方法期望使用原始NSTimeInterval(在幕后是double).

Your value is trapped in a pointer type of NSNumber. The dateWithTimeIntervalSince1970 method is expecting a primitive NSTimeInterval (which, under the covers, is a double).

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