Question

Answer 1

我不确定将UIProgressView添加为UITextField对象的子视图会很有用，因为您无法更改进度视图的框架。

子类化似乎是正确的方法。这是我能想到的。检查它是否对您有用。

<强> ProgressField.h

@interface ProgressField : UITextField {

}

@property (nonatomic, assign) CGFloat progress;
@property (nonatomic, retain) UIColor * progressColor;

@end

<强> ProgressField.m

@implementation ProgressField
@synthesize progress;
@synthesize progressColor;

- (void)setProgress:(CGFloat)aProgress {
    if ( aProgress < 0.0 || aProgress > 1.0 ) {
        return;
    }

    progress = aProgress;

    CGRect progressRect = CGRectZero;
    CGSize progressSize = CGSizeMake(progress * CGRectGetWidth(self.bounds), CGRectGetHeight(self.bounds));
    progressRect.size = progressSize;

    // Create the background image
    UIGraphicsBeginImageContext(self.bounds.size);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [UIColor clearColor].CGColor);
    CGContextFillRect(context, self.bounds);

    CGContextSetFillColorWithColor(context, [self progressColor].CGColor);
    CGContextFillRect(context, progressRect);

    UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    [super setBackground:image];
}

- (void)setBackground:(UIImage *)background {
    // NO-OP
}

- (UIImage *)background {
    return nil;
}

- (id)initWithFrame:(CGRect)frame {
    if ((self = [super initWithFrame:frame])) {
        [self setBorderStyle:UITextBorderStyleBezel];
    }
    return self;
}

这似乎与UITextField设置为borderStyle的{{1}}无效。

Answer 2

UIProgressView* progressView = [[UIProgressView alloc] init];
progressView.frame = aUITextField.frame;// you can give even set the frame of your own using CGRectMake();
[aUITextField addSubview:progressView];
progressView.progress = 0.5;
[progressView release];

设置进度视图的框架。

Answer 3

这里我认为你必须将progressView作为子视图添加到self.view中，只需根据适合UITextField的大小设置progressView的框架，并将progressview的set center设置为UITextField的中心。希望它会对你有所帮助。

在UITextField对象中显示进度条

3 个答案: