button或者lab下邊的下劃線

在開發中會遇到這樣的需求，在lab或者是button下邊需要下劃線，現在舉兩個例子

1.在button下邊加上下劃線

uibutton *btn = [uibutton buttonwithtype:uibuttontypecustom];

btn.frame = cgrectmake(100, 200, 200, 40);

nsmutableattributedstring *title = [[nsmutableattributedstring alloc] initwithstring:@"我就是下劃線"];

nsrange titlerange = ;

[title addattribute:nsunderlinestyleattributename value:[nsnumber numberwithinteger:nsunderlinestylesingle] range:titlerange];

[btn setattributedtitle:title

forstate:uicontrolstatenormal];

[btn.titlelabel setfont:[uifont systemfontofsize:20]];

[self.view addsubview:btn];

2.在lab下邊加上下劃線

uilabel *label = [[uilabel alloc] initwithframe:cgrectmake(10, 100, 310, 350)];

label.numberoflines =0;

[label setfont:[uifont systemfontofsize:14]];

nsmutableattributedstring *content = [[nsmutableattributedstring alloc]initwithstring:[nsstring stringwithformat:@"喬丹科比詹姆斯杜蘭特庫里韋德"]];

nsrange contentrange = ;

// 下劃線

[content addattribute:nsunderlinestyleattributename value:[nsnumber numberwithinteger:nsunderlinestylesingle] range:contentrange];

// 刪除線

[content addattribute:nsstrikethroughstyleattributename value:[nsnumber numberwithinteger:nsunderlinestylesingle] range:nsmakerange(3,12)];

// 字型大小

[content addattribute:nsfontattributename value:[uifont systemfontofsize:20.0] range:nsmakerange(0, 2)];

// 字型顏色

[content addattribute:nsforegroundcolorattributename value:[uicolor redcolor] range:nsmakerange(3, 10)];

// 刪除線的顏色

[content addattribute:nsstrikethroughcolorattributename value:[uicolor greencolor] range:nsmakerange(8, 10)];

label.attributedtext = content;

[self.view addsubview:label];