iOS 字符串中动态改变小数点个数

//联系人:石虎  QQ: 1224614774 昵称:嗡嘛呢叭咪哄

一、动态改变小数点个数

- (void)viewDidLoad {

    [super viewDidLoad];

    

    NSInteger pointNum = 7;

    CGFloat num = 3.23323000000;

    

    NSString *string = [NSString stringWithFormat:@"%%.%ldf",pointNum];

    NSString *str = [NSString stringWithFormat:string, num];

    NSLog(@"str %@", str);

}

打印结果:2017-09-17 00:07:49.487 dddd[99756:2847097] str 3.2332300

二、效果图:

图1:

图2:

谢谢!!!