我会将第三个参数添加到您的 datamanager 函数中:
- (NSArray*)titlesForEntriesBetween:(NSInteger)startIndex
and:(NSInteger)stopIndex
withFunction:(BOOL(^)(NSString*))block {
NSMutableArray *retVal = [NSMutableArray array];
for(NSInteger i = startIndex; i <= stopIndex; ++i) {
NSString *string = [array_ objectAtIndex:i];
if (block(string)) {
[retVal insertObject:string];
}
}
return retVal;
}
然后我会这样调用函数:
titles = [datamanager titlesForEntriesBetween:(NSInteger)[slider minSelectedValue] and:(NSInteger)[slider maxSelectedValue] withFunction:^(BOOL)(NSString *str) {
NSData *data = [str dataUsingEncoding:NSASCIIStringEncoding];
NSString *simpleString = [[[NSString alloc] initWithData:data usingEncoding: NSASCIIStringEncoding] autorelease];
return [simpleString isEqualToString:str];
}]];
注意:我只是输入了这个,我没有尝试编译/运行它。