// 创建NSMutableArray
NSMutableArray *userArr = [[NSMutableArray alloc]init];
// 添加一个元素
[userArr addObject:@”11″];
NSLog(@”arr = %@”, userArr);
// 添加多个元素
[userArr addObjectsFromArray:@[@”11″, @”22″, @”33″]];
NSLog(@”arr = %@”, userArr);
// 取出当前时间
NSDate *currentDate = [NSDate date];
// 设置时间格式
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
// 时间的格式
formatter.dateFormat = @”yyyy-MM-dd HH:mm:ss”;
// 获取时间的字符串
NSString *date = [formatter stringFromDate:currentD
1、减号表示对象方法。语法：-（返回值类型）方法名：（参数类型）参数名
@interface LoginViewController : UIViewController<UIGestureRecognizerDelegate, UITextFieldDelegate, UITextViewDelegate>
@property (weak, nonatomic) IBOutlet UITextField *usercodeTextField;
@property (we
NSString *str = @”1″;
// 字符转int
int intV = [str intValue];
// int转字符
NSString *stringInt = [NSString stringWithFormat:@”%d”, intV];
// 字符转float
float floatString = [str floatValue];
// float转字符
NSString *stringFloat = [NSString string
// 创建字符串
NSString *str = @”hi, jzh蒋”;
// 字符串长度，OC中英文都占1个字节
NSLog(@”%ld”, [str length]);
// 格式化字符串
NSString *str1 = [NSString stringWithFormat:@”格式化 %02d- %02d”, 1, 9];
NSLog(@”%@”, str1);
// 字符串拼接
NSString *str2 = [NSString stringWith
// 定义一个字符串
NSString *str = @”hi, jzh”;
// 内存地址，变量
NSLog(@”str的地址=%p, str的值=%@”, str, str);
// 打印OC字符串要用@””
NSLog(@”hi”);
// “%zi” 格式化输出符号与类型转换 正整数
NSInteger age;
age = 35;
NSString *userage = [NSString stringWithFormat:@”%zi”, age];
NSLog(@”%@”, userage);
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
// 例子: 一个方法可以包含多个参数
– (void) setNameStr: (NSString *)aName secondName: (NSString *) bName thirdName: (NSString *) cName;
/ 例子: 一个方法可以包含多个参数
– (void) setNameStr: (NSString *)aName secondName: (NSString *) bName thirdName: (NSString *) cName {
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
1、下载smarty-3.1.33.zip
http://www.smarty.net/。
2、目录结构。
3、配置。
templates（模板文件，如：index.tpl）、templates_c（编译文件，如cad94cda9f5ff435ea84f153c8926d085f4ef47d_6.file.config.conf.php）、configs（配置文件，如：config.conf）、cache（缓存文件，如：4891a89acfbf800ce951dbd8c1e
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascript”>
1、元素选择器
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script type=”text/javascri
$() 函数是 jQuery() 函数的别称。
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title>jQuery</title>
<script src=”jquery-3.3.1.min.js”></script>
</head>
<body>
<script typ