iOS-将JSON字符串转换为JSON对象后更改的十进制值
我从我的背景中得到数据iOS-将JSON字符串转换为JSON对象后更改的十进制值,ios,Ios,我从我的背景中得到数据 NSString * jsonStr = data[@"result"]; NSData * jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding]; NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil
NSString * jsonStr = data[@"result"];
NSData * jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
这是JsonStr:
{"id":2,"name":"轮胎式起重机","brand":"中联","type":"QY130","weight":130.0,"isValid":"1","ext1":65.9,"ext2":34.6,"ext3":100.6,"ext4":75.0,"ext5":65805.0,"createTime":"2016-07-20 10:58:09"}
在JsonStr中@“ext1”的值为65.9,但在jsonobject之后,该值变为“65.9000000000001”
这是dic:
{
brand = "\U4e2d\U8054";
createTime = "2016-07-20 10:58:09";
ext1 = "65.90000000000001";
ext2 = "34.6";
ext3 = "100.6";
ext4 = 75;
ext5 = 65805;
id = 2;
isValid = 1;
name = "\U8f6e\U80ce\U5f0f\U8d77\U91cd\U673a";
type = QY130;
weight = 130;
}
此数据有什么问题?当您将
ext1
用作NSNumber时:
NSNumber *ext1 = @([dic[@"ext1"] floatValue]);
NSLog(@"%@", ext1);
将是65.9
NSString:
NSString *ext1Str = [NSString stringWithFormat:@"%@",ext1];
NSLog(@"%@", ext1Str);
2016-08-0113:19:46.969 OCDemo[2200:78063]65.9
2016-08-01 13:19:46.970 OCDemo[2200:78063]65.9
我使用ext1
作为文本字段文本mainLengthText.text=[nsstringwithformat:@“%@”,dic[@“ext1”]
@ChengNSString*ext1=[nsstringwithformat:@“%@”,“@([dic[@“ext1”]floatValue])代码>谢谢,它可以显示正确的值,但dic值65.90000000001的原因是什么?在我看来,65.9
的类型是Json中的数字。因此,您必须将其作为NSNumber接收。