//
// RootViewController.m
// UI- 12 block传值
//
// Created by dllo on 15/11/24.
// Copyright (c) 2015年 dllo. All rights reserved.
//
#import "RootViewController.h"
#import "SencondViewController.h"
@interface RootViewController ()
@end
@implementation RootViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"下一页" style: UIBarButtonItemStylePlain target:self action:@selector(rigthAct:)];
// void (^bolck1)(void) = ^(void) {
// NSLog(@"1");
// };
// bolck1();
// Do any additional setup after loading the view.
}
- (void)rigthAct:(UIBarButtonItem *)sender
{
// SencondViewController *SendVc = [[SencondViewController alloc]init];
// __unsafe_unretained RootViewController *rootvc = self;
// [self.navigationController pushViewController:SendVc animated:YES];
// void (^change)(UIColor *) = ^(UIColor *mycolor) {
//// self.view.backgroundColor = mycolor;
// rootvc.view.backgroundColor = mycolor;
// };
// [SendVc sendblock:change str:@"aaa"];
//简写
#warning block传值1 - 定义block 并通过调用sendVC的方法将block的地址传过去
SencondViewController *SendVc = [[SencondViewController alloc]init];
__unsafe_unretained RootViewController *rootvc = self;
[SendVc sendblock:^(UIColor *mycolor) {
self.view.backgroundColor = mycolor;
} str:@"aaa"];
[self.navigationController pushViewController:SendVc animated:YES];
[SendVc release];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
//
// SencondViewController.h
// UI- 12 block传值
//
// Created by dllo on 15/11/24.
// Copyright (c) 2015年 dllo. All rights reserved.
//
#import <UIKit/UIKit.h>
typedef void (^blackType)(UIColor *);
@interface SencondViewController : UIViewController
{
// void (^_myblock)(UIColor *);
#warning block传值3 定义实例变量 ,指向传递来的block,可供其他方法内调用block
blackType _myBlock;
}
#warning block传值2 - 声明方法 用来接受block的地址 同时可以顺带接受其他传递信息
- (void)sendblock:(blackType)bolck str:(NSString *)str;
@end
//
// SencondViewController.m
// UI- 12 block传值
//
// Created by dllo on 15/11/24.
// Copyright (c) 2015年 dllo. All rights reserved.
//
#import "SencondViewController.h"
@implementation SencondViewController
- (void)dealloc
{
#warning block传值6 - 引用计数减1
Block_release(_myBlock);
[super dealloc];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
UIButton *button = [ UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(50, 100, 50, 50);
button.backgroundColor = [UIColor purpleColor];
[button addTarget:self action:@selector(buttonAct:) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"发春" forState:UIControlStateNormal];
[self.view addSubview:button];
// Do any additional setup after loading the view.
}
- (void)buttonAct:(UIButton *)sender
{
#warning block传值5 - 调用block 传递参数
_myBlock([UIColor redColor]);
}
- (void)sendblock:(blackType)bolck str:(NSString *)str;
{
NSLog(@"%@",str);
// _myblock = bolck;
// bolck([UIColor yellowColor]);
#warning block传值4 - 将rootVC中定义的block空间拷贝到堆区,防止释放
_myBlock = Block_copy(bolck);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end