判斷字串是否為空白，判斷字串

判斷字串是否為空白，判斷字串

 

代碼：

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        self.title=@"判斷字串是否為空白";        NSLog(@"--字串是否為空白-%i-",[self isBlankString:@"123455"]);    }//判斷字串是否為空白- (BOOL) isBlankString:(NSString *)string {    if (string == nil || string == NULL) {        return YES;    }    if ([string isKindOfClass:[NSNull class]]) {        return YES;    }    if ([[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length]==0) {        return YES;    }    return NO;}

 

輸出：

2014-12-08 11:02:31.303 判斷字串是否為空白[7256:60b] --字串是否為空白-0-