Bildsymbol zu einer UIPickerView Zeile hinzufügen

Question

Ich habe im Netz gesucht und gesucht und nicht viel gefunden!

Ich würde gerne wissen, wie Sie Bilder in einem UIPicker setzen, so dass jede der Zeilen ein anderes Bild haben.

#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

anstelle von

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

Sie können folgende Datenquelle Methode verwenden benutzerdefiniertes Objekt in Reihe Schritt 1 hinzuzufügen: Erstellen UIImageView Objekts Schritt 2: zuweisen entsprechendes Symbol Bild, um es Schritt 3: return Ihr UIImageView Objekt

- (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

Hier teile ich das ganze Beispiel wie ich es implementiert habe.

Bitte überprüfen 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];} 

auf diese Weise implementieren. Dieser Code funktioniert gut für mich. Bitte überprüfen Sie und lassen Sie mich wissen, dass es in Ordnung ist.

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; 
}