创建uilabel

self.lbl=[[uilabel alloc] initwithframe:cgrectmake(135, 290,200,35)];

self.lbl.backgroundcolor=[uicolor clearcolor];

nsstring *str=[nsstring stringwithformat:@%.f,[self.slider value]];

[self.lbl setfont:[uifont fontwithname:@arial-boldmt size:16]];

self.lbl.text=str;

[self.view addsubview:self.lbl];

点击uibutton时修改uilabel文本尺寸

-(ibaction)buttonpressed:(id)sender

{

[self.lbl setfont:[uifont fontwithname:@arial-boldmt size:25]];

}

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