跨文件传值
- 较常用的Block用法
- 过程：由
ViewController调用BSGBlockMethod的方法，并于BSGBlockMethod.h赋值并传递给ViewController - 先设置
BSGBlockMethod，后于ViewController调用 - 也可以用做成属性的形式进行传值
- 第一个是直接定义Block，Block可以重复使用；第二种方法则是将Block直接嵌入方法中，不需要专门在方法外定义Block
定义Block的方法
ViewController.m：
#import "BSGBlockMethod.h"
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
BSGBlockMethod * BlockMethod = [[BSGBlockMethod alloc]init];
[BlockMethod BSGManagerWithBlock:^(NSString *a, NSString *b) {
NSLog(@"a:%@,b:%@",a,b);
}];
}
BSGBlockMethod.h：
#import <Foundation/Foundation.h>
@interface BSGBlockMethod : NSObject
typedef void(^MyBlock)(NSString* a,NSString * b);
-(void)BSGManagerWithBlock:(MyBlock)TheBlock;
@end
BSGBlockMethod.m：
#import "BSGBlockMethod.h"
@implementation BSGBlockMethod
-(void)BSGManagerWithBlock:(MyBlock)TheBlock
{
NSString * a = @"hi~";
NSString * b = @"~hello";
TheBlock(a,b);
}
@end
将Block直接嵌入方法中
- 名称就不要在意了，封装网络请求的时候顺便测试的
- 未封装成单例，反正也没什么大影响，用
[BSGHTTPManager manager]单纯是为了随大流
ViewController.m：
#import "BSGHTTPManager.h"
- (void)viewDidLoad {
[super viewDidLoad];
BSGHTTPManager * BSGManager = [BSGHTTPManager manager];
[BSGManager BSGBlockWithFirstString:@"hello " secondString:@"xigua!" backBlock:^(NSString *resultString) {
NSLog(@"result:%@",resultString);
}];
}
BSGHTTPManager.h：
#import <Foundation/Foundation.h>
@interface BSGHTTPManager : NSObject
+(instancetype)manager;
//一个无关测试
-(void)BSGBlockWithFirstString:(NSString *)aString secondString:(NSString *)bString backBlock:(void(^)(NSString * resultString))blockMessage;
BSGHTTPManager.m：
#import "BSGHTTPManager.h"
#import <AFHTTPSessionManager.h>
@implementation BSGHTTPManager
+(instancetype)manager{
return [[[self class] alloc] init];
}
//测试
-(void)BSGBlockWithFirstString:(NSString *)aString secondString:(NSString *)bString backBlock:(void (^)(NSString *))blockMessage
{
NSString * resultStr = [aString stringByAppendingString:bString];
blockMessage(resultStr);
}
文件内传值
懒得写
参考文章不一定看了
参考链接：iOS中Block的基础用法
参考链接：一篇文章看懂iOS代码块Block
