Uilabel text vertical top Alignment Method

I also don't know Why uilabel itself does not provide the vertical top Alignment Method for the text, which is a bit dizzy. Let's create a simple uilabel to see:

[Box Type = "info"]

Uilabel * mylabel = [[uilabel alloc] initwithframe: cgrectmake (10, 10,300,100)];

[Mylabel settext: @ "Apple IOs (iPhone Operation System) is a handheld device operating system developed by Apple. Apple first announced the system at the Macworld conference in January 9, 2007, initially designed for the iPhone "];

[Mylabel setfont: [uifont fontwithname: @ "Arial" Size: 14.0];

[Mylabel setbackgroundcolor: [uicolor bluecolor];

[Mylabel settextcolor: [uicolor whitecolor];

[Self. View addsubview: mylabel];

[/Box]

The effects shown on the IOS simulator are as follows:

 

This is obviously not what we want. Let's add another line of code:

Mylabel. numberoflines = 0;

The result is:

 

The display is a bit normal, but how to align the top of the text?

Implementation Code:

[Box Type = "info"]

Uilabel * mylabel = [[uilabel alloc] init]; // withframe: cgrectmake (10, 10,300,100)];

 

Uifont * strfont = [uifont fontwithname: @ "Arial" Size: 14.0];

 

[Mylabel setfont: strfont];

[Mylabel setbackgroundcolor: [uicolor bluecolor];

[Mylabel settextcolor: [uicolor whitecolor];

Mylabel. numberoflines = 0;

 

Cgsize maximumsize = cgsizemake (300,999 );

Nsstring * string = @ "Apple IOs (iPhone Operation System) is a handheld device operating system developed by Apple. Apple first announced the system at the Macworld conference in January 9, 2007, initially designed for iPhone use ";

Cgsize stringsize = [String sizewithfont: strfont

Constrainedtosize: maximumsize

Linebreakmode: mylabel. linebreakmode];

[Mylabel settext: String];

Cgrect strframe = cgrectmake (10, 10,300, stringsize. Height );

Mylabel. Frame = strframe;

[Self. View addsubview: mylabel];

 

[/Box]

The running result is as follows:

 

If you have a better way to align the vertical top of uilabel, you must share it.