兼容iOS7+-的相片选择器
- 创建相册资源reformer，展示相册选择器
TBVAssetsPickerController *viewController = [[TBVAssetsPickerController alloc] initWithPickManager:self.reformer.pickManager];
viewController.delegate = self;
[self presentViewController:viewController animated:YES completion:nil];
- 实现代理TBVAssetsPickerControllerDelegate
/* 超过限制 */
- (void)assetsPickerController:(TBVAssetsPickerController *)picker overMaxSelectedCount:(NSInteger)selectedCount {
NSString *title = [NSString stringWithFormat:@"最多只能选择%@张", @(selectedCount)];
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:title
message:nil
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:@"确定", nil];
[alertView show];
}
/* 获取选中资源 */
- (void)assetsPickerController:(TBVAssetsPickerController *)picker didFinishPickingAssets:(NSArray<TBVAsset *> *)assets {
}- 在选中资源时可依次获取图片，进行后续处理，如发送至服务器/qiniu
- (void)sendAssets:(NSArray <TBVAsset *> *)assets {
RACSignal *concatedSignal = [[assets.rac_sequence
map:^id(TBVAsset *asset) {
return [[[[self.reformer imageWithAsset:asset mode:TBVAssetsReformerModeLarge]
filter:^BOOL(RACTuple *value) {
return [value.second integerValue] == 0;
}]
reduceEach:^id (UIImage *image, NSNumber *degraded){
/* signal which sends image to server */
return [[RACSignal return:image] delay:1.0];
}]
switchToLatest];
}]
foldLeftWithStart:nil reduce:^id(RACSignal *accumulator, RACSignal *value) {
return accumulator ? [accumulator concat:value] : value;
}];
[concatedSignal subscribeNext:^(id value) {
TBVLogDebug(@"%@", value);
}];
}- Masonry
- ReactiveCocoa