如何创建小费气球？

Question

Here is my image.I want to create a tip balloon like this. This must visible when user types in textfield

我已经创建了一个但是云形状。请帮助创建此

Answer 1

对UITextField进行子类，然后覆盖becomeFirstResponder（显示气泡）和resignFirstResponder（隐藏气泡），当字段处于活动状态时，会显示您的气泡。

<强>·H

#import <UIKit/UIKit.h>

@interface BubbleTextField : UITextField

@end

<强>的.m

#import "BubbleTextField.h"

@interface BubbleTextField ()
{
    UIView *_bubbleView;
}

- (void)showBubble:(BOOL)show;

@end

@implementation BubbleTextField

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialize the _bubbleView here
    }
    return self;
}

#pragma mark - Override

- (BOOL)becomeFirstResponder {
    BOOL shouldBecome = [super becomeFirstResponder];

    if (shouldBecome)
    {
        [self showBubble:YES];
    }

    return shouldBecome;
}

- (BOOL)resignFirstResponder {
    BOOL shouldResign = [super resignFirstResponder];

    if (shouldResign)
    {
        [self showBubble:NO];
    }

    return shouldResign;
}

#pragma mark - Private Methods

- (void)showBubble:(BOOL)show {
    // Show/Hide
    // Animations etc.
}

@end

Answer 2

• 查看 KBPopupBubble 。
• CMPopTipView
• 另外，请查看这些搜索结果，了解可可控制的自定义控件。的 Search Results 即可。