1.计算NSAttributedString字符串的高度问题（字符串中带有高亮的富文本）
CGSize textBlockMinSize = {(KScreenWidth -115), CGFLOAT_MAX};
NSAttributedString *text = model.attributedContent;
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:0.01];//设置行高
CGSize size = [[text string] boundingRectWithSize:textBlockMinSize
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:@{
NSFontAttributeName:[UIFont fontWithName:@"PingFangSC-Regular" size:14.0f],
NSParagraphStyleAttributeName:paragraphStyle
}
context:nil].size;
2.后台获取分页数据，循环请求
__block NSMutableArray *temp = [NSMutableArray new];
// 1.创建一个串行队列，保证for循环依次执行
dispatch_queue_t serialQueue1 = dispatch_queue_create("serialQueue1", DISPATCH_QUEUE_SERIAL);
// 2.异步执行任务
dispatch_async(serialQueue1, ^{
// 3.创建一个数目为1的信号量，用于“卡”for循环，等上次循环结束在执行下一次的for循环
dispatch_semaphore_t sema1 = dispatch_semaphore_create(1);
static NSInteger page = 1;
for (NSInteger j = 0; j<50; j++) {
dispatch_semaphore_wait(sema1, DISPATCH_TIME_FOREVER);
printf("信号量等待中\n");
if (j != 0 && temp.count ==0) {
dispatch_semaphore_signal(sema1);
break;
}
//异步任务
NSMutableDictionary *params = [NSMutableDictionary new];
[params setObject:[NSNumber numberWithInteger:page] forKey:@"pageNum"];
[params setObject:[NSNumber numberWithInteger:10] forKey:@"pageSize"];
[[Server getInstance] baserequest:nil :GROUPMEMBERS :params :^(id requsetStr) {
if (requsetStr !=0 && requsetStr !=nil) {
if ([requsetStr count] == 0) {
page =1;
temp = [NSMutableArray new];
dispatch_semaphore_signal(sema1);
}
else{
page++;
temp = [[NSMutableArray alloc]initWithArray:requsetStr];
dispatch_semaphore_signal(sema1);
}
//这里处理获取到的数据
for (NSDictionary *dic in (NSArray *)requsetStr) {
MemberModel *model = [[MemberModel alloc]initWithDictionary:dic];
if (model.role == 2 ||model.role ==1) {
[self.adminsArr addObject:model];
}
else{
[self.usersArr addObject:model];
}
}
//数组排序
NSSortDescriptor *role = [NSSortDescriptor sortDescriptorWithKey:@"role" ascending:YES];
NSSortDescriptor *gmtModified = [NSSortDescriptor sortDescriptorWithKey:@"gmtModified" ascending:YES];
self.adminsArr = [[self.adminsArr sortedArrayUsingDescriptors:@[role,gmtModified]] mutableCopy];
[self.listView reloadData];
}
else{
}
}];
}
NSLog(@"其他操作");
});
