block方法传值

---

DataHandler.h

  @interfaceDataHandler :NSObject

#warning第一步

//声明方法在方法中封装block

-(void)sendNumber:(NSInteger)num

Block:(void(^)(NSString* string))block;

+(void)sendNumber:(NSInteger)num

Block:(void(^)(NSString* string))block;

(2)

-(void)appendString:(NSString*)string

Block:(void(^)(NSString* str))block;

+(void)separateString:(NSString* )string

Block:(void(^)(NSArray* array))block;

@end

---

DataHandler.m

(1)

@implementationDataHandler

#warning第二步

-(void)sendNumber:(NSInteger)num Block:(void(^)(NSString*))block{

NSString* string = [NSStringstringWithFormat:@"%ld",num];

block(string);

}

+(void)sendNumber:(NSInteger)num Block:(void(^)(NSString*))block{

NSString* string = [NSStringstringWithFormat:@"%ld",num];

block(string);

}

(2)

DataHandler2* dataHandler2 = [[DataHandler2alloc]init];

[dataHandler2appendString:@"99999"Block:^(NSString*str) {

self.textField.text= str;

}];

[DataHandler2separateString:@"9396@qq.com"Block:^(NSArray*array) {

NSLog(@"%@",array);

}];

@end

OneViewController.m

#warning第三步-- (-)号方法

DataHandler* dataHandler = [[DataHandleralloc]init];

[dataHandlersendNumber:10086

Block:^(NSString*string) {

self.label.text= string;

}];

OneViewController.m

#warning第三步-- (+)号方法

[DataHandlersendNumber:100000Block:^(NSString*string) {

self.textField.text=string;

}];