IOS 输入校验

1、数字字符校验

#define NUMBERSPERIOD @"0123456789."  

1. -(BOOL)checkNumber:(NSString *)string  
2. {  
3.     NSCharacterSet*cs;     
4.     cs =[[NSCharacterSet characterSetWithCharactersInString:NUMBERSPERIOD]invertedSet];     
5.     NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs]componentsJoinedByString:@""];  
6.     BOOLbasicTest = [string isEqualToString:filtered];  
7.     return basicTest;     
8. }  

2、判断用户名，在2－16位

1. -(BOOL)checkName:(NSString *)_text  
2. {  
3.     NSString *Regex = @"^\\w{2,16}{1}quot;;  
4.    NSPredicate *Test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];  
5.     return [Test evaluateWithObject:_text];  
6. }  

3、判断手机号码，1开头的十一位数字

1. -(BOOL)checkMobile:(NSString *)_text  
2. {  
3.     NSString *Regex = @"1\\d{10}";  
4.    NSPredicate *Test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];  
5.     return [Test evaluateWithObject:_text];  
6. }  

4、判断邮箱

1. -(BOOL)checkEmail:(NSString  *)_text  
2. {  
3.     NSString *Regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";  
4.    NSPredicate *Test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];  
5.     return [Test evaluateWithObject:_text];  
6. }  

5、判断密码，6－16位

1. -(BOOL)checkPassWord:(NSString  *)_text  
2. {  
3.     NSString *Regex = @"\\w{6,16}";  
4.    NSPredicate *Test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];  
5.     return [Test evaluateWithObject:_text];  
6. }  

只能输入非零开头的正整数用下面的代码

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

2{

3    NSString *result = [textField.text stringByReplacingCharactersInRange:range withString:string];

4    if ([result length] == 0) return YES; // Allow delete all character which are entered.

5     

6    NSString *regex = @"^[0-9]*[1-9][0-9]*$";

7    NSPredicate *prd = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

8    return [prd evaluateWithObject:result];

9}