界面?zhèn)髦?/p>
單利 .h
typedef void (^callBlock)(NSString *str);
@interface Global : NSObject
@property (nonatomic, copy) callBlock callblock;
+ (instancetype)manager;
- (void)readBlock:(callBlock)block;
- (void)setBlock:(NSString *)str;
@end
.m
@implementation Global
+ (instancetype)manager
{
static Global *_manager = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (_manager == nil) {
_manager = [[Global alloc]init];
}
});
return _manager;
}
- (void)readBlock:(callBlock)block{
_callblock = [block copy];
}
- (void)setBlock:(NSString *)str{
if (_callblock) {
_callblock(str);
}
}
@end
