- (BOOL)isPureInt:(NSString *)string{ NSScanner* scan = [NSScanner scannerWithString:string]; int val; return [scan scanInt:&val] && [scan isAtEnd]; }
判断是否为浮点形:
- (BOOL)isPureFloat:(NSString *)string{ NSScanner* scan = [NSScanner scannerWithString:string]; float val; return [scan scanFloat:&val] && [scan isAtEnd]; }