ios - 创建一组 UITextViews，这些 UITextViews 可以动态调整大小并相对于彼此布置到位

Question

我有一个自定义 UIView，我想在其中布局一组 UITextView 以响应 AJAX 调用。所以我想我需要在代码中创建这些。我目前将位置设置为固定位置，但宁愿将其设置为比前一个位置低 20 像素。另外，我想将 UITextView 的最小宽度设置为 650 像素。我正在使用 AutoLayout，但对实现此目的的最佳方法感到困惑。我已经包含了我的代码，但我真的在寻找什么策略最能实现这一点？使用 AutoLayout 约束？

我已经介绍了我目前的做法，但我想解决动态垂直放置和 UITextView 的固定宽度为 650 点的问题。在策略或代码方面的任何帮助将不胜感激。

for (int i = 0; i < [some count]; i++) {
    int my_counter=i+1;
    // this is obviously putting it a fixed location
    UITextView *textview= [[UITextView alloc]initWithFrame:CGRectMake(110, (130 * my_counter), 650, 90)];
    [textview setScrollEnabled:YES];
    textview.layer.borderWidth = 5.0f;
    textview.layer.borderColor = [[UIColor grayColor] CGColor];
    [textview  setTextContainerInset:UIEdgeInsetsMake(7, 7, 7, 7)];
    NSString *tmp_header=[some[i] objectForKey:@"header"];
    NSString *tmp_body=[some[i] objectForKey:@"body"];

    //NSString *str = @"This is <font color='red'>simple</font>";
    if(![tmp_header isEqualToString:@""] && ![tmp_body isEqualToString:@""]){
        NSString *myString=[NSString stringWithFormat:@"%@ \n %@", tmp_header, tmp_body];
        [textview setValue:myString forKey:@"contentToHTMLString"];
    }
    if([tmp_header isEqualToString:@""] && ![tmp_body isEqualToString:@""]){
        [textview setValue:@"body is cool" forKey:@"contentToHTMLString"];
    }

    textview.textAlignment = NSTextAlignmentLeft;
    textview.editable = NO;
    textview.font = [UIFont fontWithName:@"vardana" size:20.0];
    [textview sizeToFit];
    [textview setScrollEnabled:NO];
    //textview.contentSize.width=650;
    [self.noteView addSubview:textview];

}

Answer 1

通常，对于此类问题，您需要跟踪循环外的某些内容，以将先前的结果传递给下一个循环迭代。此代码应该有效:

CGFloat runningYPosition = 130.f; // Y position of first text view
for (int i = 0; i < 10; i++) {
    // Let's not care about the text view frame right now.
    // Let's just create, configure, populate, then set a frame based on contents/configuration.
    UITextView *textview= [[UITextView alloc]initWithFrame:CGRectZero];
    textview.layer.borderWidth = 5.0f;
    textview.layer.borderColor = [[UIColor grayColor] CGColor];
    [textview  setTextContainerInset:UIEdgeInsetsMake(7, 7, 7, 7)];
    NSString *tmp_header=[some[i] objectForKey:@"header"];
    NSString *tmp_body=[some[i] objectForKey:@"body"];

    //NSString *str = @"This is <font color='red'>simple</font>";
    if(![tmp_header isEqualToString:@""] && ![tmp_body isEqualToString:@""]){
        NSString *myString=[NSString stringWithFormat:@"%@ \n %@", tmp_header, tmp_body];
        [textview setValue:myString forKey:@"contentToHTMLString"];
    }
    if([tmp_header isEqualToString:@""] && ![tmp_body isEqualToString:@""]){
        [textview setValue:@"body is cool" forKey:@"contentToHTMLString"];
    }

    textview.textAlignment = NSTextAlignmentLeft;
    textview.editable = NO;
    textview.font = [UIFont fontWithName:@"vardana" size:20.0];

    // Set the text view frame
    CGSize textViewSize = [textview sizeThatFits:CGSizeMake(650.f, CGFLOAT_MAX)];
    textview.frame = CGRectMake(110.f, runningYPosition, textViewSize.width, textViewSize.height);

    [self.view addSubview:textview];

    // Update the running Y position for the next text view's frame, 20 pts below the current one.
    runningYPosition = CGRectGetMaxY(textview.frame) + 20.f;
}