* 判断字符串是否为空
* &-originstring 待传入字符串
* 返回一个BOOL值:YES为空
*/
* 判断字符串是否为空
*/
+ (BOOL)isBlankString:(NSString *)originstring{
if (originstring == nil) {
return YES;
}
if ([originstring isEqualToString: @" "]) {
return YES;
}
if (originstring == NULL) {
return YES;
}
if ([originstring isKindOfClass:[NSNull class]]) {
return YES;
}
if (originstring.length == 0) {
return YES;
}
return NO;