iOS 2通过字符串 提取方法 并执行
2017-07-12 本文已影响2人
PPFSaber
1.1通过字符串 提取方法 并执行
SEL selector = NSSelectorFromString(@"dismissViewController:");
if ([self respondsToSelector:selector]) {
[self performSelector:selector withObject:self];
[self performSelector:selector];
}
swift
对应方法 public func perform(_ aSelector: Selector!) -> Unmanaged<AnyObject>!
let selec = NSSelectorFromString("dismissViewController:")
if self.responds(to: selec) {
self.perform(selec)
self.perform(selec, with: self)
}
func dismissViewController(object:NSObject) -> Void {
NSLog("ss" )
}
1.2 字典的空值对象
[NSNull null]
swift
var s = NSNull.init()
