UIScollView

 
 
NSArray 类定义的方法

1.  makeObjectsPerformSelector:@select(aMethod)

简介:让数组中的每个元素 都调用 aMethod 

2. makeObjectsPerformSelector:@select(aMethod)

                     withObject:oneObject

简介:让数组中的每个元素 都调用 aMethod  并把 withObject 后边的 oneObject 对象做为参数传给方法aMethod

[array makeObjectsPerformSelector:@selector(setRecurringDelegate:)

                                  withObject:self];/*将检测到的该自动插入的交易插入数据库*/

   

[array makeObjectsPerformSelector:@selector(insertRecursion)]; /*将检测到的该自动插入的交易插入数据库*/
 
 
 
 
    //居中
纯代码自动布局NSLayoutConstraint
  [NSLayoutConstraint constraintWithItem:ban  attribute:NSLayoutAttributeCenterX   relatedBy:NSLayoutRelationEqual
 
                          toItem:self.view

                              attribute:NSLayoutAttributeCenterX

                              multiplier:1

 
                              constant:0]];
原文地址:https://www.cnblogs.com/xsyl/p/6085915.html