分享一个iOS输入框特殊限制的代码 UITextField (Validation)

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#import <UIKit/UIKit.h>typedef enum{    VALIDATION_TYPE_NUM_VALIDATED = 0,//数字    VALIDATION_TYPE_ID_CARD_VALIDATED = 1,//身份证    VALIDATION_TYPE_MOBILE_PHONE_VALIDATED = 2,//手机号    VALIDATION_TYPE_EMAIL_VALIDATED = 3,//email} ValidationType;@interface UITextField (Validation)-(void)setValidationType:(ValidationType)validationType;-(NSString *)errorMessage;- (void)limitTextLength:(int)length;@end

#import "UITextField+Validation.h"#import <objc/objc.h>#import <objc/runtime.h>static NSString *kLimitTextMaxLengthKey = @"kLimitTextMaxLengthKey";static NSString *kLimitTextErrorMessageKey = @"kLimitTextErrorMessageKey";@implementation UITextField (Validation)-(void)resetTextfieldValidation{    objc_setAssociatedObject(self, (__bridge  const void *)(kLimitTextErrorMessageKey), nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);}-(void)setValidationType:(ValidationType)validationType{    [self addTarget:self action:@selector(resetTextfieldValidation) forControlEvents:UIControlEventEditingDidBegin];    self.keyboardType = UIKeyboardTypeDefault;        if (validationType == VALIDATION_TYPE_NUM_VALIDATED) {        [self limitTextOnlyNumber];        self.keyboardType = UIKeyboardTypeNumberPad;    }else if(validationType == VALIDATION_TYPE_EMAIL_VALIDATED){        [self limitTextOnlyEmail];        self.keyboardType = UIKeyboardTypeEmailAddress;    }else if(validationType == VALIDATION_TYPE_MOBILE_PHONE_VALIDATED){        [self limitTextOnlyPhone];        self.keyboardType = UIKeyboardTypePhonePad;    }else if(validationType == VALIDATION_TYPE_ID_CARD_VALIDATED){        [self limitTextOnlyIDCard];    }        [self limitTextNoSpace];}-(NSString *)errorMessage{    NSString *str= objc_getAssociatedObject(self, (__bridge  const void *)(kLimitTextErrorMessageKey));    if (str) {        return str;    }    return nil;}#pragma mark - Limit Text Length- (void)limitTextLength:(int)length{    objc_setAssociatedObject(self, (__bridge  const void *)(kLimitTextMaxLengthKey), [NSNumber numberWithInt:length], OBJC_ASSOCIATION_RETAIN_NONATOMIC);    [self addTarget:self action:@selector(textFieldTextLengthLimit:) forControlEvents:UIControlEventEditingChanged];}- (void)textFieldTextLengthLimit:(id)sender{    NSNumber *maxLengthNumber = objc_getAssociatedObject(self, (__bridge  const void *)(kLimitTextMaxLengthKey));    int maxLength = [maxLengthNumber intValue];    if(self.text.length > maxLength){        self.text = [self.text substringToIndex:maxLength];    }}#pragma mark - Limit Text Only Number-(void)limitTextOnlyNumber{    [self addTarget:self action:@selector(textFieldTextNumberLimit:) forControlEvents:UIControlEventEditingChanged];}- (void)textFieldTextNumberLimit:(id)sender{    if (!self.text.length) {        [self resetTextfieldValidation];        return;    }    NSString * regexNum = @"^\\d*$";    NSPredicate *regexNumPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regexNum];    if ([regexNumPredicate evaluateWithObject:self.text]==YES) {    }else{        self.text=[self.text substringFromIndex:self.text.length];    }}#pragma mark - Limit Text Only Phone-(void)limitTextOnlyPhone{    [self addTarget:self action:@selector(textFieldTextPhoneLimit:) forControlEvents:UIControlEventEditingDidEnd];    [self limitTextLength:11];    [self limitTextOnlyNumber];}- (void)textFieldTextPhoneLimit:(id)sender{    if (!self.text.length) {        [self resetTextfieldValidation];        return;    }    //    NSString * regex=@"^((13[0-9])|(147)|(15[^4,\\D])|(18[0,5-9]))\\d{8}$";    NSString * regex=@"^1\\d{10}$";    NSPredicate *regexPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];    if ([regexPredicate evaluateWithObject:self.text]==YES) {        self.text=[self.text substringToIndex:self.text.length];        [self resetTextfieldValidation];    }else{        self.text=[self.text substringToIndex:self.text.length];        objc_setAssociatedObject(self, (__bridge  const void *)(kLimitTextErrorMessageKey), @"请输入正确的手机号码", OBJC_ASSOCIATION_RETAIN_NONATOMIC);    }}#pragma mark - Limit Text For Email-(void)limitTextOnlyEmail{    [self addTarget:self action:@selector(textFieldTextForEmailLimit:) forControlEvents:UIControlEventEditingDidEnd];}- (void)textFieldTextForEmailLimit:(id)sender{    if (!self.text.length) {        [self resetTextfieldValidation];        return;    }    NSString *regex=@"^[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]\\.[a-zA-Z][a-zA-Z\\.]*[a-zA-Z]$";    NSPredicate *regexPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];    if ([regexPredicate evaluateWithObject:self.text]==YES) {        [self resetTextfieldValidation];    }else{        objc_setAssociatedObject(self, (__bridge  const void *)(kLimitTextErrorMessageKey), @"邮箱格式错误", OBJC_ASSOCIATION_RETAIN_NONATOMIC);    }}#pragma mark - Limit Text For IDCard-(void)limitTextOnlyIDCard{    [self addTarget:self action:@selector(textFieldTextForIDCardLimit:) forControlEvents:UIControlEventEditingDidEnd];    [self limitTextLength:18];}- (void)textFieldTextForIDCardLimit:(id)sender{    if (!self.text.length) {        [self resetTextfieldValidation];        return;    }    //NSString *regex=@"^(4\\d{12}(?:\\d{3})?)$";    NSString *regex=@"^([1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3})|([1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}([0-9]|X))$";    NSPredicate *regexPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];    if ([regexPredicate evaluateWithObject:self.text]==YES) {        [self resetTextfieldValidation];    }else{        objc_setAssociatedObject(self, (__bridge  const void *)(kLimitTextErrorMessageKey), @"身份证格式错误", OBJC_ASSOCIATION_RETAIN_NONATOMIC);    }}#pragma mark - Limit Text NoSpace- (void)limitTextNoSpace{    [self addTarget:self action:@selector(textFieldTextNoSpaceLimit:) forControlEvents:UIControlEventEditingDidEnd];}- (void)textFieldTextNoSpaceLimit:(id)sender{    self.text = [self noSpaceString:self.text];}- (NSString *)noSpaceString:(NSString *)str{    if (str.length) {        return  [str stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceCharacterSet]];    }        return str;}@end

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