我正在使用纯代码创建UIPickerView，我将UIPickerView作为ContentView CXAlertView datasource（https://github.com/ChrisXu1221/CXAlertView）中的子视图。
我已经配置了delegate和AlertView's但是当我运行它时，ContentView NSLog中没有显示任何内容，其中pickerview将我的组件的数字返回为1 。
这里奇怪的是，当我将IBOutlet链接为HJCouponViewController.m时，一切正常。
请帮忙。
（PS：请忽略我的代码中的实例，它们都在工作）
#import "HJCouponViewController.h"
#import "CXAlertView.h"
@interface HJCouponViewController()<UIPickerViewDelegate, UIPickerViewDataSource> {
NSArray *largeArray;
NSArray *smallArray;
}
@property (strong,nonatomic) UIPickerView *prizePicker;
@end
@implementation
-(void)viewDidLoad{
[self.prizePicker setDelegate:self];
[self.prizePicker setDataSource:self];
}
- (IBAction)addPicker:(id)sender {
CXAlertView *pickerAlert = [[CXAlertView alloc]initWithTitle:@"Select one" message:@"Choose From Below" cancelButtonTitle:@"Cancel"];
[pickerAlert addButtonWithTitle:@"Select" type:CXAlertViewButtonTypeDefault handler:^(CXAlertView *alertview, CXAlertButtonItem *button){
}];
[pickerAlert setContentView:[self prizePickerContent]];
[self.prizePicker reloadAllComponents];
[pickerAlert show];
NSLog(@"%d",prizePicker.numberOfComponents);
}
#pragma mark - Pickerview Datasource
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 2;
}
-(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{
if (component == 0) {
return 80;
}
return 160;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent: (NSInteger)component{
if (component == 0) {
return 3;
}
if (component == 1) {
NSInteger index = [prizePicker selectedRowInComponent:0];
switch (index) {
case 0:
return 1;
break;
case 1:
return smallArray.count;
break;
case 2:
return largeArray.count;
break;
default:
break;
}
}
return 0;
}
-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
if (component == 0) {
NSArray *leftComponentNameArray = @[@"Favourite",@"Small Prizes",@"Large Prizes"];
return [leftComponentNameArray objectAtIndex:row];
}
if (component == 1) {
NSInteger index = [prizePicker selectedRowInComponent:0];
switch (index) {
case 0:
return @"Not Set yet";
break;
case 1:{
HJInstance *smallInstance = [smallArray objectAtIndex:row];
return smallInstance.Name;
break;
}
case 2:{
HJInstance *largeInstance = [largeArray objectAtIndex:row];
return largeInstance.Name;
}
break;
default:
break;
}
}
return nil;
}
@end
{{1}}
答案 0 :(得分：0)
我错过了一个将选择器添加到视图层次结构的行：
[self.view addSubview:pickerAlert];
答案 1 :(得分：0)
-(void)ViewDidLoad
需要
-(void)viewDidLoad
（小写＆＃39; v＆＃39;）