ios - 检测 NSString 是否为 float

Question

我正在尝试检测 NSString 是否为 float ，例如:@"-73.041382"

但是当我尝试使用这种方法时，我得到了错误的结果:

-(bool) isNumeric:(NSString*) checkText{

NSNumberFormatter* numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];
NSNumber* number = [numberFormatter numberFromString:checkText];
if (number != nil) {
    return true;
}
return false;

有人有想法!？

谢谢

Answer 1

我找到了答案:

-(bool) isNumeric:(NSString*) checkText{

NSNumberFormatter* numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];
//Set the locale to US
[numberFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease]];
//Set the number style to Scientific
[numberFormatter setNumberStyle:NSNumberFormatterScientificStyle];
NSNumber* number = [numberFormatter numberFromString:checkText];
if (number != nil) {
    return true;
}
return false;
}

谢谢!