// for ios8.3 [forbid disappear slider]
[[UISliderappearance] setMinimumTrackTintColor:[UIColorcolorWithRed:0green:0blue:1alpha:1.0f]];
[[UISliderappearance] setMaximumTrackTintColor:[UIColorcolorWithRed:0green:0blue:1alpha:1.0f]];
// for ios8.3 [forbid disappear slider]
[[UISliderappearance] setMinimumTrackTintColor:[UIColorcolorWithRed:0green:0blue:1alpha:1.0f]];
[[UISliderappearance] setMaximumTrackTintColor:[UIColorcolorWithRed:0green:0blue:1alpha:1.0f]];