##oc与swift混用编程，以及block，闭包的使用方法
@interfaceViewController : UIViewController
@property(nonatomic,copy)BlockValueblockValue;
@end
//oc引用swift需要improt“xxx-swift.h”,这个文件是隐藏的，但是可以import
#import "多态-Swift.h"
@interfaceViewController()
@property(nonatomic,strong)NSString*str ;
@end
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
self.view.backgroundColor= [UIColorredColor];
//oc引用swift类
ViewControllerMy*my = [[ViewControllerMyalloc]init];
//swift 通过闭包传值，类似oc的block
my.backValueBlock= ^(NSString* _Nonnullstr) {
NSLog(@"swift send a value ~~~");
};
my.sendValue=@"oc传值";
[self.navigationControllerpushViewController:my animated:YES];
//oc使用block
self.blockValue= ^(NSString*str) {
NSLog(@"%@",str);
};
//OC block传值
if(self.blockValue) {
self.blockValue(@"OC block传值");
}
}
@end
//swift 文件里面block写法
importUIKit
typealiasBackValueBlock = (String)->()//声明一个闭包
@objcMembers
classViewControllerMy: UIViewController{
//从oc 传送过来的值
varsendValue:String?;
var backValueBlock:BackValueBlock?;//把闭包声明成一个属性
overridefuncviewDidLoad() {
super.viewDidLoad()
print("swift view")
self.view.backgroundColor= UIColor.purple;
self.navigationItem.title= "swift view";
print(self.sendValue!)
letperson = Person.init();
letblack = blackColor.init();
person.print(black);
//创建一个按钮
letbutton = UIButton.init(type: .custom);
button.frame= CGRect(x: 0, y: 100, width: 100, height: 100);
button.backgroundColor= UIColor.red;
button.setTitle("swift点击", for: .normal);
button.addTarget(self, action:#selector(buttonClick(btn:)), for: .touchUpInside)
self.view.addSubview(button);
}
//按钮点击事件
@objcfuncbuttonClick(btn:UIButton){
print(btn);
print("点击了button");
backValueBlock!("swift send a value!!!!");
}
}