iOS 文本框只能输入数字

引入协议

<UITextFieldDelegate>

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

//如果是限制只能输入数字的文本框

if (_moneyTextField==textField) {

return [self validateNumber:string];

}

//否则返回yes,不限制其他textfield

return YES;

}

- (BOOL)validateNumber:(NSString*)number {

BOOL res = YES;

NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];

int i = 0;

while (i < number.length) {

NSString * string = [number substringWithRange:NSMakeRange(i, 1)];

NSRange range = [string rangeOfCharacterFromSet:tmpSet];

if (range.length == 0) {

res = NO;

break;

}

i++;

}

return res;

}

//限制弹出数字键盘

_IDField.keyboardType = UIKeyboardTypeNumberPad;

//修改return按键样式

_IDField.returnKeyType = UIReturnKeySearch;//变为搜索按钮

//新版手机正则表达式(手机号换的太快，这里就做个简单的判断)

- (BOOL)isMobileNumber:(NSString *)mobileNum

{

if (mobileNum.length != 11)

{

return NO;

}

return YES;

}