UILabel text layout when packaging is “wrong” in iOS 7

Question

The screenshot is shown in iOS 7. label1(yellow, top) is drawn with text appearing under the upper left edge of the frame and cropped from the bottom. In iOS 5/6, the beginning of the text is the upper left edge of the label frame. label2and label3rendering and layout as expected.

Here is the code to create this view:

- (void)loadView
{
    UIView *view = [[UIView alloc] initWithFrame:UIScreen.mainScreen.applicationFrame];
    view.backgroundColor = UIColor.blueColor;
    self.view = view;

    UILabel *label1 = [UILabel new];
    label1.backgroundColor = UIColor.yellowColor;
    label1.font = [UIFont systemFontOfSize:16.0f];
    label1.numberOfLines = 0;
    label1.lineBreakMode = NSLineBreakByWordWrapping;
    label1.frame = CGRectMake(50, 100, 200, 18);
    label1.text = @"This text is too long to fit on one line.";
    [self.view addSubview:label1];

    UILabel *label2 = [UILabel new];
    label2.backgroundColor = UIColor.greenColor;
    label2.font = [UIFont systemFontOfSize:16.0f];
    label2.numberOfLines = 0;
    label2.lineBreakMode = NSLineBreakByWordWrapping;
    label2.frame = CGRectMake(50, 150, 200, 36);
    label2.text = @"This text is too long to fit on one line.";
    [self.view addSubview:label2];

    UILabel *label3 = [UILabel new];
    label3.backgroundColor = UIColor.orangeColor;
    label3.font = [UIFont systemFontOfSize:16.0f];
    label3.numberOfLines = 0;
    label3.lineBreakMode = NSLineBreakByWordWrapping;
    label3.frame = CGRectMake(50, 200, 200, 18);
    label3.text = @"This text is short.";
    [self.view addSubview:label3];
}

QUESTION . Why is this different in iOS 7 and what properties of the label do I need to change so that the text in is label1displayed, starting from the upper left edge of its frame, as expected.

Answer 1

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. label1 18. 16 . iOS 5/6, -, , iOS 7 . , , , .

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