将图像图标添加到UIPickerView行

Question

我看了看网上，并没有发现太多！

我想知道如何将图像放入UIPicker中，以便每行都有不同的图像。的

#import "ViewController.h" 

    @interface ViewController() 

    @end 

    @implementation ViewController 
    @synthesize pickerContent; 

    @synthesize p1; 


    - (void)viewDidLoad 
    { 
     [super viewDidLoad]; 
     // Do any additional setup after loading the view, typically from a nib. 
    } 

    - (void)didReceiveMemoryWarning 
    { 
     [super didReceiveMemoryWarning]; 
     // Dispose of any resources that can be recreated. 
    } 


    ////////// 

    - (NSMutableArray *)pickerContent 
    { 
     if(!pickerContent) { 
      pickerContent = [[NSMutableArray alloc] initWithObjects: 
           [UIImage imageNamed:@"one.jpg"], 
           [UIImage imageNamed:@"two.jpg"], 
           [UIImage imageNamed:@"three.jpg"], 
           [UIImage imageNamed:@"four.jpg"], 
           [UIImage imageNamed:@"five.jpg"], nil]; 
     } 
     return pickerContent; 
    } 


    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
    { 
     if ([pickerView isEqual:p1]) 
     { 
      return 4; 
     } 

      return 0; 

    } 
    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 
    { 


     if ([pickerView isEqual:p1]) 
     { 
      if (component == R1)return [self.pickerContent count]; 
      if (component == R2)return [self.pickerContent count]; 
      if (component == R3)return [self.pickerContent count]; 
      if (component == R4)return [self.pickerContent count]; 
     } 

     return 0; 
    } 

    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
    { 
     if ([pickerView isEqual:p1]) 
     { 
      if (component== R1)return [pickerContent objectAtIndex:row]; 
      if (component== R2)return [pickerContent objectAtIndex:row]; 
      if (component== R3)return [pickerContent objectAtIndex:row]; 
      if (component== R4)return [pickerContent objectAtIndex:row]; 
     } 

    return 0; 

    } 
    @end 

Answer 1

代替

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 

可以使用以下数据源的方法添加自定义对象在排 步骤1：创建的UIImageView对象 步骤2：分配适当的图标图像到它 步骤3：返回你的UIImageView对象

- (UIView *)viewForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 
    UIImageView *myIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"myIconName"]]; 
    [myIcon setFrame:CGRectMake(0, 0, 50, 50)]; 
    return myIcon; 
} 

Answer 2

在这里，我分享整个例子，我已经实现的方式。

请检查CustomPickerViewController.h

#import <UIKit/UIKit.h> 
@interface CustomPickerViewController : UIViewController 
<UIPickerViewDataSource , UIPickerViewDelegate>{ 
     IBOutlet UIPickerView *picker; 
     IBOutlet UILabel *winLabel; 

     NSArray *column1; 
     NSArray *column2; 
     NSArray *column3; 
     NSArray *column4; 
     NSArray *column5; 
} 
@property (nonatomic,retain) UIPickerView *picker;@property (nonatomic,retain) UILabel *winLabel;@property (nonatomic,retain) NSArray *column1;@property (nonatomic,retain) NSArray *column2;@property (nonatomic,retain) NSArray *column3;@property (nonatomic,retain) NSArray *column4;@property (nonatomic,retain) NSArray *column5; 
-(IBAction)spin; 

CustomPickerViewController.m 


-(void)spin 
    { 
      BOOL win = NO; 
      int numInRow = 1; 
      int lastVal = -1; 
      for(int i = 0; i<5 ;i++) 
      { 
        int newValue = random() % [self.column1 count]; 
        if(newValue == lastVal) 
          numInRow++ ; 
        else 
          numInRow = 1; 
        lastVal = newValue; 
        [picker selectRow:newValue inComponent:i animated:YES]; 
        [picker reloadComponent:i]; 
        if(numInRow >= 3) 
          win = YES; 
      } 

      if(win) 
        winLabel.text = @"WIN!"; 
      else 
        winLabel.text = @""; 
    } 
- (void)viewDidLoad { 

     UIImage *seven = [UIImage imageNamed:@"seven.png" ]; 
     UIImage *bar = [UIImage imageNamed:@"bar.png" ]; 
     UIImage *crown = [UIImage imageNamed:@"crown.png" ]; 
     UIImage *cherry = [UIImage imageNamed:@"cherry.png" ]; 
     UIImage *lemon = [UIImage imageNamed:@"lemon.png" ]; 
     UIImage *apple = [UIImage imageNamed:@"apple.png"]; 


for(int i =1; i<=5; i++) 
{ 
    UIImageView *sevenView = [[UIImageView alloc] initWithImage:seven]; 
    UIImageView *barView = [[UIImageView alloc] initWithImage:bar]; 
    UIImageView *crownView = [[UIImageView alloc] initWithImage:crown]; 
    UIImageView *cherryView = [[UIImageView alloc] initWithImage:cherry]; 
    UIImageView *lemonView = [[UIImageView alloc] initWithImage:lemon]; 
    UIImageView *appleView = [[UIImageView alloc] initWithImage:apple]; 


     NSArray *imageViewArray = [[NSArray alloc] initWithObjects: 
     sevenView,barView, crownView,cherryView,lemonView,appleView,nil]; 

     NSString *fieldName = [[NSString alloc] initWithFormat:@"column%d",i]; 
     [self setValue:imageViewArray forKey:fieldName]; 
     [fieldName release]; 
     [imageViewArray release]; 

     [sevenView release]; 
     [barView release]; 
     [crownView release]; 
     [cherryView release]; 
     [lemonView release]; 
     [appleView release]; 
    } 
     srandom(time(NULL));} 

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ 
     return 5;} 

-(NSInteger)pickerView:(UIPickerView *)pickerView 
numberOfRowsInComponent:(NSInteger)component{ 
     return [self.column1 count];} 

-(UIView *)pickerView:(UIPickerView *)pickerView 
    viewForRow:(NSInteger)row 
     forComponent:(NSInteger)component reusingView:(UIView *)view{ 
     NSString *arrayName = [[NSString alloc]initWithFormat:@"column%d",component+1]; 
     NSArray *array = [self valueForKey:arrayName]; 
     return [array objectAtIndex:row];} 

这种方式实现。这段代码对我来说工作正常。请检查并让我知道这没关系。

Answer 3

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{ 
    UIImage *img = [UIImage imageNamed:[NSString stringWithFormat:@"your image number %@.png", (long)row]]; 
    UIImageView *temp = [[UIImageView alloc] initWithImage:img]; 
    temp.frame = CGRectMake(-70, 10, 60, 40); 

    UILabel *channelLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, -5, 80, 60)]; 
    channelLabel.text = [NSString stringWithFormat:@"%@", [your array objectAtIndex:row]]; 
    channelLabel.textAlignment = UITextAlignmentLeft; 
    channelLabel.backgroundColor = [UIColor clearColor]; 

    UIView *tmpView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 110, 60)]; 
    [tmpView insertSubview:temp atIndex:0]; 
    [tmpView insertSubview:channelLabel atIndex:1]; 

    return tmpView; 
}