输入手机号 实现自动三 四 四格式

 1 //键盘改变，控制变更
 2 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
 3     
 4     NSCharacterSet*cs;
 5     cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS] invertedSet];
 6     NSString*filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
 7     BOOL basicTest = [string isEqualToString:filtered];
 8 
 9     NSInteger existedLength = textField.text.length;
10     NSInteger selectedLength = range.length;
11     NSInteger replaceLength = string.length;
12     
13     if (existedLength - selectedLength + replaceLength >14) {
14         return NO;
15     }
16 
17     
18     if(basicTest)
19     {
20         if (textField == phoneTxtField)
21         {
22 
23             if ([string isEqualToString:@""]){ // 删除字符
24                 if (((textField.text.length - 2) % 4 == 0) &&((textField.text.length - 2) % 6 != 0)) {
25                     textField.text = [textField.text substringToIndex:textField.text.length - 1];
26                 }else if ((textField.text.length - 2) % 9 == 0){
27                     textField.text = [textField.text substringToIndex:textField.text.length - 1];
28                 }
29                 return YES;
30             } else {
31                 if (textField.text.length<5) {
32                     if (textField.text.length % 4 == 0) {
33                         textField.text = [NSString stringWithFormat:@"%@ ", textField.text];
34                     }
35                 }else{
36                     if (textField.text.length % 9 == 0) {
37                     textField.text = [NSString stringWithFormat:@"%@ ", textField.text];
38                 }
39                 }
40                 
41             }
42             return YES;
43         }
44     }
45     else
46     {
47         return NO;
48     }
49     
50     
51     if (string.length == 0) {
52         
53         return YES;
54     }
55     
56     
57     return YES;
58     
59 
60     
61 }
62 
63 
64 //键盘关闭
65 -(void)textFieldDidEndEditing:(UITextField *)textField
66 {
67     if ((textField == phoneTxtField) &&(textField.text.length==14) ){
68        NSLog(@"输入了九位");
69         NSString *all=[phoneTxtField.text substringFromIndex:1];
70         
71         NSString *first=[all substringToIndex:3];
72         
73         NSString *pp=[all substringFromIndex:4];
74         
75         NSString *center=[pp substringToIndex:4];
76         
77         NSString *last=[pp substringFromIndex:5];
78         
79         NSLog(@"aaaaaaaaaa=%@%@%@\n",first,center,last);
80         
81         userPhone=[NSString stringWithFormat:@"%@%@%@",first,center,last];
82 
83     }
84 }