Iphone 更改Pickerview中的文本大小

如何在选择器视图中更改文本的大小

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任何人请帮助。

您可以使用以下代码更改UIPickerView的字体大小：

 - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
forComponent:(NSInteger)component reusingView:(UIView *)view {
            UILabel *retval = (id)view;
            if (!retval) {
                retval= [[[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)] autorelease];
            }

            retval.font = [UIFont systemFontOfSize:22];

       return retval;
    }

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您可以使用以下代码更改UIPickerView的字体大小：

 - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
forComponent:(NSInteger)component reusingView:(UIView *)view {
            UILabel *retval = (id)view;
            if (!retval) {
                retval= [[[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)] autorelease];
            }

            retval.font = [UIFont systemFontOfSize:22];

       return retval;
    }

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为了完整起见，yakub_moriss代码缺少一行，这是indragie发出的信号。没有一行

retval.text = [pickerViewArray objectAtIndex:row];

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选择器将为空。

为完整起见，yakub_moriss代码缺少一行，这是indragie发出的信号。没有一行

retval.text = [pickerViewArray objectAtIndex:row];

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选择器将为空。

这也是更改组件中文本对齐方式的好方法，也可以更改retval标签的文本对齐方式

此外，标签的背景应设置为清晰：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UILabel *retval = (id)view; if (!retval) { retval = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)]; } retval.opaque = NO; retval.backgroundColor = [UIColor clearColor]; retval.font = [UIFont systemFontOfSize:28]; if (component == 0) { retval.textAlignment = UITextAlignmentRight; retval.text = [NSString stringWithFormat:@"%d ", row]; } else { retval.textAlignment = UITextAlignmentLeft; retval.text = [NSString stringWithFormat:@" .%d", row]; } return retval; } - (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { if (component == 0) { return 100; } return 88; }

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这也是更改组件中文本对齐方式的好方法，也可以更改retval标签的textAlignment

此外，标签的背景应设置为清晰：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UILabel *retval = (id)view; if (!retval) { retval = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)]; } retval.opaque = NO; retval.backgroundColor = [UIColor clearColor]; retval.font = [UIFont systemFontOfSize:28]; if (component == 0) { retval.textAlignment = UITextAlignmentRight; retval.text = [NSString stringWithFormat:@"%d ", row]; } else { retval.textAlignment = UITextAlignmentLeft; retval.text = [NSString stringWithFormat:@" .%d", row]; } return retval; } - (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { if (component == 0) { return 100; } return 88; }

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我使用的是一个类别。它依赖于我拥有的其他类别：

不管怎样，这个看起来像这样：

#import <UIKit/UIKit.h>

@interface UIPickerView (CustomViewForRow)

@property (nonatomic, strong) UIFont *customViewForRowFont;

- (UIView *)customViewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;

@end

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我使用的是一个类别。它依赖于我拥有的其他类别：

不管怎样，这个看起来像这样：

#import <UIKit/UIKit.h>

@interface UIPickerView (CustomViewForRow)

@property (nonatomic, strong) UIFont *customViewForRowFont;

- (UIView *)customViewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;

@end

试试这个 很容易挑选：

试试这个

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很容易挑选：

Hey Luca的可能重复的可能重复在这个概念上有一个疑问。实际上我的数组是arr1。因此我相应地设置了retval.text=[arr1 objectAtIndex:row]；但是我得到的错误就像这个程序在那条特定的线路上接收到信号SIGABRT；pickerView.frame=CGRectMake10,75200150；pickerView.delegate=self；pickerView.showsSelectIndicator=是；对于标签大小，我添加了与Yakub所说的相同的代码。你能告诉我y吗？嘿，Luca对这个概念有一个疑问。实际上我的数组是arr1。因此，我相应地设置了retval.text=[arr1 objectAtIndex:row]；但是我得到的错误就像这个程序在那条特定的线路上接收到信号SIGABRT；pickerView.frame=CGRectMake10,75200150；pickerView.delegate=self；pickerView.showsSelectIndicator=是；对于标签大小，我添加了与Yakub所说的相同的代码。你能告诉我y吗？