UIPickerView – 多行行 – 需要布局建议

我想用2行做拾取器，我尝试了它就像一个链接 ，但我无法理解我需要做什么：创建一个视图和2标签，当我向代码添加标签坐标，但选择字段仍然喜欢它默认情况下。 如何更改选择字段大小？ 选择字段中的文本在其他行时具有更大的大小。 对不起我的英语不好。

- (UIView*)pickerView:(UIPickerView *)thePickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UIView* v; if (view) v = view; else { v = [[UIView alloc] init] ; UILabel* l1 = [[UILabel alloc] init]; l1.tag = 11; [v addSubview: l1]; UILabel* l2 = [[UILabel alloc] init]; l2.tag = 12; l2.autoresizingMask = UIViewAutoresizingFlexibleTopMargin; [v addSubview: l2]; } UILabel* l1 = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 110, 35)]; l1.font = [UIFont systemFontOfSize:22]; // choose desired size l1.text = [NSString stringWithFormat: @"row %d line 1", row]; l1.tag = 11; [v addSubview: l1]; UILabel* l2 = [[UILabel alloc] initWithFrame:CGRectMake(10, 34 , 110, 35)]; l2.font = [UIFont systemFontOfSize:14]; // choose desired size l2.text = [NSString stringWithFormat: @"row %d line 2", row]; l2.tag = 12; [v addSubview: l2]; return v; } 

UPDATE

  - (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component { return yourViewHeight; } - (UIView*)pickerView:(UIPickerView *)thePickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UIView* v; if (view) v = view; else { v = [[UIView alloc] initWithFrame:CGRectMake(0, 34, 110, 35)] ; UILabel* l1 = [[UILabel alloc] init]; l1.tag = 11; [v addSubview: l1]; UILabel* l2 = [[UILabel alloc] init]; l2.tag = 12; l2.autoresizingMask = UIViewAutoresizingFlexibleTopMargin; [v addSubview: l2]; } UILabel* l1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 110, 35)]; l1.font = [UIFont systemFontOfSize:22]; // choose desired size l1.text = [NSString stringWithFormat: @"row %d line 1", row]; l1.tag = 11; [v addSubview: l1]; UILabel* l2 = [[UILabel alloc] initWithFrame:CGRectMake(0, 34 , 110, 35)]; l2.font = [UIFont systemFontOfSize:14]; // choose desired size l2.text = [NSString stringWithFormat: @"row %d line 2", row]; l2.tag = 12; [v addSubview: l2]; return v; } 

http://i.picresize.com/images/2013/12/11/IiYqd.png

Answer 1

希望它会起作用……

1. 实现此委托方法并返回视图的高度

• （CGFloat）pickerView：（UIPickerView *）pickerView rowHeightForComponent：（NSInteger）组件{return yourViewHeight; }

1. 为您的标签和视图设置框架。标签的框架不会超出视图的框架

 - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{ //1. Create your view and set frame for the view //2. Create your label 1 and label 2 set the frame for your labels //3. Add and return your view } 

Answer 2

您应该实现pickerView:rowHeightForComponent:视图委托方法，并为自定义视图返回足够高的高度。

您还应该在pickerView:viewForRow:forComponent:reusingView: method设置v的高度pickerView:viewForRow:forComponent:reusingView: method 。

最后，如果您重复使用视图，请不要继续添加更多标签。 他们已经从重用的视图出现了。

Answer 3

试试这个代码

 - (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component { return 50; } than after - (UIView *)pickerView:(UIPickerView *)thePickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UILabel *lblTitle = [[UILabel alloc] initWithFrame:CGRectMake(5, 0, 310, 50)]; lblTitle.numberOfLines=2; lblTitle.textColor=[UIColor blackColor]; lblTitle.font=[UIFont systemFontOfSize:14]; lblTitle.text=[selectionList objectAtIndex:row]; } return lblTitle; 

}