1.该方法是从论坛上看到的，，自己用啦下 感觉挺好用，在这里做个备忘吧 ！！！！！
2.应用环境，用户输入昵称的时候，不可以输入 表情
- (BOOL)stringContainsEmoji:(NSString *)string {
__block
BOOL returnValue =NO;
[string enumerateSubstringsInRange:NSMakeRange(0, [stringlength])
options:NSStringEnumerationByComposedCharacterSequencesusingBlock:
^(NSString *substring,NSRange substringRange,
NSRange enclosingRange,
BOOL *stop) {
const
unichar hs = [substringcharacterAtIndex:0];
// surrogate pair
if (0xd800 <= hs && hs <= 0xdbff) {
if (substring.length > 1) {
const
unichar ls = [substringcharacterAtIndex:1];
const
int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
if (0x1d000 <= uc && uc <= 0x1f77f) {
returnValue =YES;
}
}
}else
if (substring.length > 1) {
const
unichar ls = [substringcharacterAtIndex:1];
if (ls == 0x20e3) {
returnValue =YES;
}
}else {
// non surrogate
if (0x2100 <= hs && hs <= 0x27ff) {
returnValue =YES;
}else
if (0x2B05 <= hs && hs <= 0x2b07) {
returnValue =YES;
}else
if (0x2934 <= hs && hs <= 0x2935) {
returnValue =YES;
}else
if (0x3297 <= hs && hs <= 0x3299) {
returnValue =YES;
}else
if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
returnValue =YES;
}
}
}];
return returnValue;
}
//邮箱的判读
//判断是否是邮箱格式
-(BOOL)isValidateEmail:(NSString *)email
{
NSString *emailRegex =
@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate
predicateWithFormat:@"SELF MATCHES%@",emailRegex];
return [emailTest
evaluateWithObject:email];
}