iOS快捷代码块

定义宏进行懒加载!!!!!!!!!!!!

#define ArrayLazyLoad(x) if (!x) { x = [NSMutableArray new];}return x

常量 和局部变量 block 中需要用__block修饰才可以在block内部修改它的值,全局变量和全局常量变量不用修饰

循环引用是自定义的block才会造成,系统的不会 归根结底还是堆栈中的释放问题.

懒加载!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!!!!

/**<#懒加载#>*/

- (<#类名#>)<#变量名#> {

    if (_<#变量名#> == nil) {

        _<#变量名#> = [[<#类名#> alloc]init];

    }

    return _<#变量名#>;

}

匿名类!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

@interface <#类名#> ()

/** <#名字#> */

@property (nonatomic ,<#assign#>)<# NSString#> * <#name#>;

@end

表格视图快捷块!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

/**创建表格试图*/

UITableView * table = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStylePlain];

table.dataSource = self;

table.delegate = self;

[self.view addSubview:table];

self.tableView = table;

属性快捷块!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

/** <#名字#> */

@property (nonatomic ,<#assign#>) <#NSString#> * <#name#>;

警告框快捷块!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

/**<#警告弹出#>*/

UIAlertController * alert = [UIAlertController alertControllerWithTitle:<#@"弹出警告"#> message:<#@"警告信息"#> preferredStyle:UIAlertControllerStyl<#eAlert#>];

    UIAlertAction * action = [UIAlertAction actionWithTitle:<#@"go"#> style:UIAlertActionStyl<#eDefault#> handler:^(UIAlertAction *action) {

    }];

    [alert addAction:action];

    [self presentViewController:alert animated:YES completion:nil];

监听中心快捷块!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

/**<#创建监听中心#>*/

//写在方法中

[[NSNotificationCenter defaultCenter]addObserver:<#self#> selector:@selector(<#keyboardNotice:#>) name:<#UIKeyboardWillShowNotification#> object:nil];

[[NSNotificationCenter defaultCenter]addObserver:<#self#> selector:@selector(<#keyboardNotice:#>) name:<#UIKeyboardWillHideNotification#> object:nil];

- (void)keyboardNotice:(NSNotification*)notice {

    if ([notice.name isEqualToString:<#UIKeyboardWillShowNotification#>]) {

        self.view.bounds = CGRectMake(0, 100, self.view.bounds.size.width, self.view.bounds.size.height);

    }else if ([notice.name isEqualToString:<#UIKeyboardWillHideNotification#>]){

        self.view.bounds = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);

    }

}

iOS快捷代码块

原文：http://www.cnblogs.com/zhang6332/p/6273351.html