IOS字符串的Format可以对数值四舍五入

NSLog(@"%@", [NSString stringWithFormat:@"%.0f", 1.0003]);
NSLog(@"%@", [NSString stringWithFormat:@"%.0f", 1.9003]);
NSLog(@"%@", [NSString stringWithFormat:@"%.0f", 1.5003]);
NSLog(@"%@", [NSString stringWithFormat:@"%.0f", 1.4003]);
// 输出
1
2
2
1

网站题目：IOS字符串的Format可以对数值四舍五入
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