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]];