//判断是否全是空格
- (BOOL)isEmpty:(NSString *) str {
if (!str) {
return YES;
} else {
NSCharacterSet *set = [NSCharacterSet whitespaceAndNewlineCharacterSet];
NSString *trimedString = [str stringByTrimmingCharactersInSet:set];
if ([trimedString length] == 0) {
return YES;
} else {
return NO;
}
}
}
时间: 2024-08-17 04:28:40