objective c - NSAlert resize window

Question

I have several NSAlert dialogs with different text. I want to adjust the alert window width to the text, so that the text don't wrap. Therefore I use this code to calculate the width of the string:

NSSize size = [myString sizeWithAttributes:@{NSFontAttributeName: [NSFont systemFontOfSize:[NSFont systemFontSize]]}];

Then I try to adjust the window of the alert:

NSAlert *alert = [NSAlert alertWithMessageText:...
...
NSPanel *panel = alert.window;
NSRect frame = panel.frame;
float x = ((NSTextField*)[[((NSPanel*)(alert.window)).contentView subviews] objectAtIndex:5]).frame.origin.x;    //the x-position of the NSTextField
frame.size.width = size.width + x;
[alert.window setFrame:frame display:YES];

This code works, but just for the first time, I call the method with this code. If I take another string and call the method again, the window will not resize (although the calculated width differentiate).

Any ideas, how I can resize the NSAlert window?

Answer 1

An NSAlert can be widened by adding an accessory view of sufficient width:

NSAlert *alert = [[[NSAlert alloc] init] autorelease];
alert.accessoryView = [[[NSView alloc] initWithFrame:NSMakeRect(0, 0, 500, 0)] autorelease];