iOS float小数四舍五入
http://blog.csdn.net/fanjunxi1990/article/details/21536189
直接贴代码了
- #import "ViewController.h"
- @interface ViewController ()
- @end
- @implementation ViewController
- - (void)viewDidLoad
- {
- [super viewDidLoad];
- NSLog(@"----%@---",[self decimalwithFormat:@"0.0000" floatV:0.334]);
- NSLog(@"----%@---",[self decimalwithFormat:@"0.0000" floatV:0.334569]);
- NSLog(@"----%@---",[self decimalwithFormat:@"0.0000" floatV:0.334519]);
- }
- - (void)didReceiveMemoryWarning
- {
- [super didReceiveMemoryWarning];
- // Dispose of any resources that can be recreated.
- }
- //格式话小数 四舍五入类型
- - (NSString *) decimalwithFormat:(NSString *)format floatV:(float)floatV
- {
- NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
- [numberFormatter setPositiveFormat:format];
- return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:floatV]];
- }
- @end
最后控制台打印结果:
- 2014-03-19 15:44:45.262 TestNumberFormatter[3056:60b] ----0.3340---
- 2014-03-19 15:44:45.263 TestNumberFormatter[3056:60b] ----0.3346---
- 2014-03-19 15:44:45.263 TestNumberFormatter[3056:60b] ----0.3345---
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